Arrange the following compounds in the increasing order of acidic strength.
🥳 Wohoo! Correct answer
Acid strength ∝ Stability of conjugate base.
Analyze the electron-withdrawing effects of substituents and resonance stabilization of conjugate bases.
Rank compounds based on the electron-withdrawing and donating groups’ effects.
Final result: Acidic strength: ii < iii < iv < i.
Confusing inductive and resonance effects on acidic strength.
😢 Uh oh! Incorrect answer, Try again
Compare substituents for their resonance and inductive effects.
Acid strength ∝ Stability of conjugate base.
Analyze the electron-withdrawing effects of substituents and resonance stabilization of conjugate bases.
Rank compounds based on the electron-withdrawing and donating groups’ effects.
Final result: Acidic strength: ii < iii < iv < i.
Confusing inductive and resonance effects on acidic strength.
Iodoform can be prepared from all, except
🥳 Wohoo! Correct answer
None
Iodoform reaction detects RCOCH₃ or RCH(OH)CH₃ structures.
Propan-1-ol does not contain the required group.
It does not give the Iodoform test.
Misidentifying compounds capable of undergoing the Iodoform test.
😢 Uh oh! Incorrect answer, Try again
Recognize structures that undergo the Iodoform test.
None
Iodoform reaction detects RCOCH₃ or RCH(OH)CH₃ structures.
Propan-1-ol does not contain the required group.
It does not give the Iodoform test.
Misidentifying compounds capable of undergoing the Iodoform test.
Acetic acid is treated with Ca(OH)₂ and the product so obtained is subjected to dry distillation. The final product is...
🥳 Wohoo! Correct answer
Decarboxylation: Dry distillation of calcium salts forms ketones.
Decarboxylation of calcium acetate forms ketones during dry distillation.
Balanced equation: CH₃COO⁻Ca⁺ + CH₃COO⁻Ca⁺ → CH₃COCH₃.
Final result: Product = Propanone.
Misunderstanding dry distillation products of calcium salts.
😢 Uh oh! Incorrect answer, Try again
Use decarboxylation to identify the final product.
Decarboxylation: Dry distillation of calcium salts forms ketones.
Decarboxylation of calcium acetate forms ketones during dry distillation.
Balanced equation: CH₃COO⁻Ca⁺ + CH₃COO⁻Ca⁺ → CH₃COCH₃.
Final result: Product = Propanone.
Misunderstanding dry distillation products of calcium salts.
Which of the following is not true?
🥳 Wohoo! Correct answer
Prontosil → Sulfanilamide conversion.
Prontosil converts to sulfanilamide in the body.
Sulfanilamide is an antibacterial active form.
Prontosil’s conversion occurs in vivo.
Believing Prontosil acts directly without metabolic conversion.
😢 Uh oh! Incorrect answer, Try again
Review antibacterial drug activation pathways.
Prontosil → Sulfanilamide conversion.
Prontosil converts to sulfanilamide in the body.
Sulfanilamide is an antibacterial active form.
Prontosil’s conversion occurs in vivo.
Believing Prontosil acts directly without metabolic conversion.
One of the following amides does not undergo Hoffmann bromamide reaction:
🥳 Wohoo! Correct answer
Hoffmann reaction occurs only for primary amides.
Hoffmann bromamide reaction occurs only with primary amides.
CH₃CONHCH₃ is a secondary amide and does not undergo the reaction.
Final result: CH₃CONHCH₃ does not undergo Hoffmann bromamide reaction.
Misidentifying amide type for Hoffmann reaction applicability.
😢 Uh oh! Incorrect answer, Try again
Identify primary vs. secondary/tertiary amides for Hoffmann reaction.
Hoffmann reaction occurs only for primary amides.
Hoffmann bromamide reaction occurs only with primary amides.
CH₃CONHCH₃ is a secondary amide and does not undergo the reaction.
Final result: CH₃CONHCH₃ does not undergo Hoffmann bromamide reaction.
Misidentifying amide type for Hoffmann reaction applicability.
Cheilosis and digestive disorders are due to the deficiency of...
🥳 Wohoo! Correct answer
Vitamin B₂: Prevents cheilitis, digestive issues.
Riboflavin (Vitamin B₂) deficiency causes cheilosis (cracked lips) and digestive disorders.
Role of Vitamin B₂: Prevents angular cheilitis and digestive issues.
Final result: Deficiency of Riboflavin (Vitamin B₂).
Confusing deficiencies of different vitamins.
😢 Uh oh! Incorrect answer, Try again
Relate symptoms to specific vitamin deficiencies.
Vitamin B₂: Prevents cheilitis, digestive issues.
Riboflavin (Vitamin B₂) deficiency causes cheilosis (cracked lips) and digestive disorders.
Role of Vitamin B₂: Prevents angular cheilitis and digestive issues.
Final result: Deficiency of Riboflavin (Vitamin B₂).
Confusing deficiencies of different vitamins.
Arrangement of following compounds: i.bromomethane ii.bromoform iii.chloromethane iii.dibromomethane In the increasing order of their boiling points is:
🥳 Wohoo! Correct answer
BP ∝ Molar mass (Van der Waals).
Boiling point increases with molar mass; CH₃Cl < CH₃Br < CH₂Br₂ < CHBr₃.
Order of boiling points: Chloromethane < Bromomethane < Dibromomethane < Bromoform.
Final result: iii < i < iv < ii.
Misinterpreting trends in boiling point variations.
😢 Uh oh! Incorrect answer, Try again
Relate boiling points to molar mass and intermolecular forces.
BP ∝ Molar mass (Van der Waals).
Boiling point increases with molar mass; CH₃Cl < CH₃Br < CH₂Br₂ < CHBr₃.
Order of boiling points: Chloromethane < Bromomethane < Dibromomethane < Bromoform.
Final result: iii < i < iv < ii.
Misinterpreting trends in boiling point variations.
One of the following is an essential amino acid is...
🥳 Wohoo! Correct answer
Isoleucine = Essential amino acid.
Essential amino acids cannot be synthesized by the body; Isoleucine must be obtained from diet.
Examples of essential amino acids: Isoleucine, Leucine, Valine, etc.
Final result: Isoleucine is an essential amino acid.
Confusing essential amino acids with non-essential ones.
😢 Uh oh! Incorrect answer, Try again
Recall essential amino acids not synthesized by humans.
Isoleucine = Essential amino acid.
Essential amino acids cannot be synthesized by the body; Isoleucine must be obtained from diet.
Examples of essential amino acids: Isoleucine, Leucine, Valine, etc.
Final result: Isoleucine is an essential amino acid.
Confusing essential amino acids with non-essential ones.
An organic compound X is oxidized by using an acidified K₂Cr₂O₇ solution. The product obtained reacts with phenylhydrazine but does not answer the silver mirror test. The compound X is
🥳 Wohoo! Correct answer
Oxidation: R₂CHOH → R₂C=O
Oxidation of 2° alcohol gives ketone: CH₃CHOHCH₃ → CH₃COCH₃
Ketones form hydrazones with phenylhydrazine
Ketones don't give silver mirror test (Tollens)
Not distinguishing aldehyde/ketone tests
😢 Uh oh! Incorrect answer, Try again
Consider difference between aldehyde and ketone tests
Oxidation: R₂CHOH → R₂C=O
Oxidation of 2° alcohol gives ketone: CH₃CHOHCH₃ → CH₃COCH₃
Ketones form hydrazones with phenylhydrazine
Ketones don't give silver mirror test (Tollens)
Not distinguishing aldehyde/ketone tests
Formation of cyanohydrins from ketones is an example of...
🥳 Wohoo! Correct answer
R-CO-R + HCN → Cyanohydrin.
CN⁻ acts as a nucleophile, attacking the ketone to form a cyanohydrin.
Reaction: R-CO-R + HCN → R-C(OH)(CN)-R (nucleophilic addition).
Final result: Reaction type = Nucleophilic addition.
Confusing nucleophilic addition with substitution.
😢 Uh oh! Incorrect answer, Try again
Relate ketone reactivity to nucleophilic addition reactions.
R-CO-R + HCN → Cyanohydrin.
CN⁻ acts as a nucleophile, attacking the ketone to form a cyanohydrin.
Reaction: R-CO-R + HCN → R-C(OH)(CN)-R (nucleophilic addition).
Final result: Reaction type = Nucleophilic addition.
Confusing nucleophilic addition with substitution.
Glycogen is...
🥳 Wohoo! Correct answer
Glycogen = (α-glucose polymer with extensive branching).
Glycogen is a multi-branched polysaccharide of glucose, serving as energy storage in animals.
Structurally, glycogen is similar to amylopectin but more extensively branched, making it efficient for energy release.
Final result: Glycogen = extensively branched polysaccharide similar to amylopectin.
Confusing glycogen with amylopectin or cellulose.
😢 Uh oh! Incorrect answer, Try again
Differentiate between glycogen, amylopectin, and cellulose structures.
Glycogen = (α-glucose polymer with extensive branching).
Glycogen is a multi-branched polysaccharide of glucose, serving as energy storage in animals.
Structurally, glycogen is similar to amylopectin but more extensively branched, making it efficient for energy release.
Final result: Glycogen = extensively branched polysaccharide similar to amylopectin.
Confusing glycogen with amylopectin or cellulose.
Adenosine is an example of...
🥳 Wohoo! Correct answer
Nucleoside = sugar + base; Nucleotide = sugar + base + phosphate.
Adenosine = nucleoside formed by adenine + ribose sugar via glycosidic bond.
Confirm difference between nucleoside (sugar + base) and nucleotide (sugar + base + phosphate).
Final result: Adenosine is a nucleoside.
Misinterpreting adenosine as a nucleotide instead of nucleoside.
😢 Uh oh! Incorrect answer, Try again
Carefully differentiate between nucleosides and nucleotides.
Nucleoside = sugar + base; Nucleotide = sugar + base + phosphate.
Adenosine = nucleoside formed by adenine + ribose sugar via glycosidic bond.
Confirm difference between nucleoside (sugar + base) and nucleotide (sugar + base + phosphate).
Final result: Adenosine is a nucleoside.
Misinterpreting adenosine as a nucleotide instead of nucleoside.
Which of the following is employed as Tranquilizer?
🥳 Wohoo! Correct answer
Drug classification
Identify tranquilizer structure (meprobamate)
Understand CNS depressant action
Compare with other drug classes
Confusing drug categories
😢 Uh oh! Incorrect answer, Try again
Consider drug functions
Drug classification
Identify tranquilizer structure (meprobamate)
Understand CNS depressant action
Compare with other drug classes
Confusing drug categories
An organic compound A on reduction gives compound B, which on reaction with trichloromethane and caustic potash forms C. The compound 'C' on catalytic reduction gives N-methyl benzenamine, the compound 'A' is
🥳 Wohoo! Correct answer
Reduction mechanisms
Write reduction equation: C₆H₅NO₂ → C₆H₅NH₂
Form isocyanide: C₆H₅NH₂ + CHCl₃ + 3KOH → C₆H₅NC + 3KCl + 3H₂O
Reduce to N-methylaniline: C₆H₅NC + 2H₂ → C₆H₅NHCH₃
Not recognizing carbylamine test
😢 Uh oh! Incorrect answer, Try again
Follow carbylamine reaction
Reduction mechanisms
Write reduction equation: C₆H₅NO₂ → C₆H₅NH₂
Form isocyanide: C₆H₅NH₂ + CHCl₃ + 3KOH → C₆H₅NC + 3KCl + 3H₂O
Reduce to N-methylaniline: C₆H₅NC + 2H₂ → C₆H₅NHCH₃
Not recognizing carbylamine test
Which of the following is correct about H-bonding in DNA?
🥳 Wohoo! Correct answer
DNA base pairing rules
Draw H-bonds between base pairs
Count H-bonds: A-T (2 H-bonds), G-C (3 H-bonds)
Verify complementary base pairing
Wrong base pairing
😢 Uh oh! Incorrect answer, Try again
Consider Watson-Crick model
DNA base pairing rules
Draw H-bonds between base pairs
Count H-bonds: A-T (2 H-bonds), G-C (3 H-bonds)
Verify complementary base pairing
Wrong base pairing
Which of the following is a polyamide?
🥳 Wohoo! Correct answer
Condensation polymerization
Identify amide linkage (-CONH-)
Write formation reaction: nH₂N(CH₂)₆NH₂ + nHOOC(CH₂)₄COOH → [-NH(CH₂)₆NH-CO(CH₂)₄CO-]n + 2nH₂O
Compare with other polymer types
Confusing with polyesters
😢 Uh oh! Incorrect answer, Try again
Look for amide bonds
Condensation polymerization
Identify amide linkage (-CONH-)
Write formation reaction: nH₂N(CH₂)₆NH₂ + nHOOC(CH₂)₄COOH → [-NH(CH₂)₆NH-CO(CH₂)₄CO-]n + 2nH₂O
Compare with other polymer types
Confusing with polyesters
Which of the following gives positive Fehling's solution test?
🥳 Wohoo! Correct answer
Fehling's test reaction
Identify reducing sugars
Understand aldehyde group oxidation in glucose
Write reaction with Fehling's solution: RCHO + 2Cu²⁺ + 5OH⁻ → RCOO⁻ + Cu₂O↓ + 3H₂O
Not considering hydrolysis
😢 Uh oh! Incorrect answer, Try again
Look for free aldehyde group
Fehling's test reaction
Identify reducing sugars
Understand aldehyde group oxidation in glucose
Write reaction with Fehling's solution: RCHO + 2Cu²⁺ + 5OH⁻ → RCOO⁻ + Cu₂O↓ + 3H₂O
Not considering hydrolysis
Which of the following is not true?
🥳 Wohoo! Correct answer
Polymerization reactions
Analyze natural rubber structure (cis-1,4-polyisoprene)
Compare with synthetic rubber structures
Note natural rubber has cis configuration only
Confusing cis-trans isomers
😢 Uh oh! Incorrect answer, Try again
Consider isomeric configurations in polymers
Polymerization reactions
Analyze natural rubber structure (cis-1,4-polyisoprene)
Compare with synthetic rubber structures
Note natural rubber has cis configuration only
Confusing cis-trans isomers
Which is not a common component of photochemical smog?
🥳 Wohoo! Correct answer
O₃ + NO₂ + PAN
List smog components
Check pollutants
Identify non-component
Component confusion
😢 Uh oh! Incorrect answer, Try again
Secondary pollutants
O₃ + NO₂ + PAN
List smog components
Check pollutants
Identify non-component
Component confusion
Benzene carbaldehyde is reacted with concentrated NaOH solution to give the products A and B
🥳 Wohoo! Correct answer
None required
Write Cannizzaro reaction
Identify oxidation product
Identify reduction product
Not recognizing Cannizzaro reaction
😢 Uh oh! Incorrect answer, Try again
Consider disproportionation
None required
Write Cannizzaro reaction
Identify oxidation product
Identify reduction product
Not recognizing Cannizzaro reaction
Ethanol is converted into ethoxy ethane
🥳 Wohoo! Correct answer
Williamson Ether Synthesis mechanism
Dehydration occurs at specific temperature (140°C): C₂H₅OH + HOC₂H₅ → C₂H₅OC₂H₅ + H₂O
H₂SO₄ protonates one ethanol molecule to form ethyloxonium ion
SN² attack by second ethanol molecule forms ether
Confusing with elimination reaction
😢 Uh oh! Incorrect answer, Try again
Consider temperature's role in dehydration vs. elimination
Williamson Ether Synthesis mechanism
Dehydration occurs at specific temperature (140°C): C₂H₅OH + HOC₂H₅ → C₂H₅OC₂H₅ + H₂O
H₂SO₄ protonates one ethanol molecule to form ethyloxonium ion
SN² attack by second ethanol molecule forms ether
Confusing with elimination reaction
Bactericidal antibiotic among the following is
🥳 Wohoo! Correct answer
Fluoroquinolone class
Compare antibiotics
Check mechanism
Identify bactericidal
Antibiotic classification
😢 Uh oh! Incorrect answer, Try again
Kills bacteria
Fluoroquinolone class
Compare antibiotics
Check mechanism
Identify bactericidal
Antibiotic classification
Pick the correct statement among the following
🥳 Wohoo! Correct answer
Detergent classification
Compare statements
Check detergent types
Find correct
Detergent type confusion
😢 Uh oh! Incorrect answer, Try again
Given as bonus question
Detergent classification
Compare statements
Check detergent types
Find correct
Detergent type confusion
Pick the wrong statement about Vitamins
🥳 Wohoo! Correct answer
Vitamin deficiency diseases
Compare statements
Check vitamin effects
Find incorrect
Deficiency effects
😢 Uh oh! Incorrect answer, Try again
D causes rickets, not xerophthalmia
Vitamin deficiency diseases
Compare statements
Check vitamin effects
Find incorrect
Deficiency effects
Which is not a biodegradable polymer?
🥳 Wohoo! Correct answer
Non-natural polymer
Check degradability
Compare structures
Identify non-biodegradable
Polymer classification
😢 Uh oh! Incorrect answer, Try again
Synthetic polymer
Non-natural polymer
Check degradability
Compare structures
Identify non-biodegradable
Polymer classification
Ziegler-Natta catalyst is used to prepare
🥳 Wohoo! Correct answer
TiCl₄ + Al(C₂H₅)₃ catalyst
Consider catalyst role
Check polymerization type
Identify product
Students confuse HDPE and LDPE
😢 Uh oh! Incorrect answer, Try again
Stereospecific catalyst
TiCl₄ + Al(C₂H₅)₃ catalyst
Consider catalyst role
Check polymerization type
Identify product
Students confuse HDPE and LDPE
Iodine containing hormone is
🥳 Wohoo! Correct answer
Contains I atoms
Check hormone composition
Identify iodine presence
Verify function
Hormone composition
😢 Uh oh! Incorrect answer, Try again
Thyroid hormone
Contains I atoms
Check hormone composition
Identify iodine presence
Verify function
Hormone composition
Reduction of ketones cannot be carried out with which reagent?
🥳 Wohoo! Correct answer
R₂C=O → R₂CHOH
Check reducing agents
Compare conditions
Identify incorrect
Reducing agent application
😢 Uh oh! Incorrect answer, Try again
Lindlar's catalyst specific
R₂C=O → R₂CHOH
Check reducing agents
Compare conditions
Identify incorrect
Reducing agent application
The correct order of increasing basic nature for bases NH₃, CH₃NH₂ and (CH₃)₂NH in aqueous solutions
🥳 Wohoo! Correct answer
Kb increases with alkyl groups
Compare electron donation
Check alkyl effect
Order bases
Electron density effect
😢 Uh oh! Incorrect answer, Try again
More alkyl groups = more basic
Kb increases with alkyl groups
Compare electron donation
Check alkyl effect
Order bases
Electron density effect
(CH₃)₃SiCl is used during polymerization of organosilicons because
🥳 Wohoo! Correct answer
Si-O-Si backbone formation
Consider chain termination
Check end groups
Evaluate control
Students ignore chain termination role
😢 Uh oh! Incorrect answer, Try again
Controls chain length
Si-O-Si backbone formation
Consider chain termination
Check end groups
Evaluate control
Students ignore chain termination role
Which order is true regarding acidic nature of phenol?
🥳 Wohoo! Correct answer
NO₂ increases acidity
Compare substituent effects
Check acidic strength
Order compounds
Effect of substituents
😢 Uh oh! Incorrect answer, Try again
Consider EWG/EDG
NO₂ increases acidity
Compare substituent effects
Check acidic strength
Order compounds
Effect of substituents
The glycosidic linkage involved in linking the glucose units in amylose part of starch is
🥳 Wohoo! Correct answer
Linear α(1→4) glycosidic bonds
Identify bond position
Check anomeric form
Determine linkage type
Students confuse α and β linkages
😢 Uh oh! Incorrect answer, Try again
α(1→4) in amylose
Linear α(1→4) glycosidic bonds
Identify bond position
Check anomeric form
Determine linkage type
Students confuse α and β linkages
The reaction of Benzene diazonium chloride with aniline yields a yellow dye. The name of the yellow dye is
🥳 Wohoo! Correct answer
ArN₂⁺ + ArNH₂ → Ar-N=N-Ar-NH₂
Consider coupling reaction
Check product structure
Identify dye type
Students confuse different azo products
😢 Uh oh! Incorrect answer, Try again
Azo dye formation
ArN₂⁺ + ArNH₂ → Ar-N=N-Ar-NH₂
Consider coupling reaction
Check product structure
Identify dye type
Students confuse different azo products
Among the following, the branched-chain polymer is
🥳 Wohoo! Correct answer
Free radical polymerization
Check chain structure
Consider branching
Evaluate density
Students confuse LDPE and HDPE
😢 Uh oh! Incorrect answer, Try again
Branching reduces density
Free radical polymerization
Check chain structure
Consider branching
Evaluate density
Students confuse LDPE and HDPE
Which of the following is more basic than aniline?
🥳 Wohoo! Correct answer
Basic strength ∝ electron density
Compare electron availability
Check resonance
Evaluate inductive effect
Students ignore resonance effects
😢 Uh oh! Incorrect answer, Try again
Consider N electron availability
Basic strength ∝ electron density
Compare electron availability
Check resonance
Evaluate inductive effect
Students ignore resonance effects
Which of the most suitable reagent for the conversion of CH₃-CH₂-CH=CH-C(CH₃)=O to CH₃-CH₂-CH=CH-C(OH)CH₃
🥳 Wohoo! Correct answer
CH₃CO- → CH₃CHOH-
Identify the type of reaction (addition at α-carbon)
I₂/NaOH performs iodoform reaction with oxidation
Gives required product through haloform reaction
Students often confuse between different named reactions and their products
😢 Uh oh! Incorrect answer, Try again
Look for reagent that can perform haloform reaction
CH₃CO- → CH₃CHOH-
Identify the type of reaction (addition at α-carbon)
I₂/NaOH performs iodoform reaction with oxidation
Gives required product through haloform reaction
Students often confuse between different named reactions and their products
n-Propyl chloride reacts with sodium metal in dry ether to give
🥳 Wohoo! Correct answer
2RCl + 2Na → R-R + 2NaCl
Identify Wurtz reaction
Consider coupling
Check product length
Students forget chain doubling
😢 Uh oh! Incorrect answer, Try again
Double the carbon chain
2RCl + 2Na → R-R + 2NaCl
Identify Wurtz reaction
Consider coupling
Check product length
Students forget chain doubling
Which one of the following is a polyamide polymer?
🥳 Wohoo! Correct answer
nH₂N-(CH₂)₆-NH₂ + nHOOC-(CH₂)₄-COOH
Check functional groups
Identify amide linkage
Consider polymerization
Students confuse different polymer types
😢 Uh oh! Incorrect answer, Try again
Look for -CONH- group
nH₂N-(CH₂)₆-NH₂ + nHOOC-(CH₂)₄-COOH
Check functional groups
Identify amide linkage
Consider polymerization
Students confuse different polymer types
Which of the following bases is not present in DNA?
🥳 Wohoo! Correct answer
A-T and G-C base pairs
Identify nucleobases
Compare with RNA
Check base pairing
Students confuse DNA and RNA bases
😢 Uh oh! Incorrect answer, Try again
DNA has T instead of U
A-T and G-C base pairs
Identify nucleobases
Compare with RNA
Check base pairing
Students confuse DNA and RNA bases
Which of the following compounds undergoes haloform reaction?
🥳 Wohoo! Correct answer
CH₃COCH₃ + 3X₂ → CX₃COCH₃
Check for α-hydrogen
Consider carbonyl group
Evaluate halogenation
Students ignore α-hydrogen requirement
😢 Uh oh! Incorrect answer, Try again
Look for methyl ketone
CH₃COCH₃ + 3X₂ → CX₃COCH₃
Check for α-hydrogen
Consider carbonyl group
Evaluate halogenation
Students ignore α-hydrogen requirement
Phenol can be distinguished from ethanol by the reagent
🥳 Wohoo! Correct answer
C₆H₅OH + 3Br₂ → C₆H₂Br₃OH + 3HBr
Consider aromatic substitution
Check reactivity
Compare reaction rates
Students forget about aromatic substitution
😢 Uh oh! Incorrect answer, Try again
Look for electrophilic substitution
C₆H₅OH + 3Br₂ → C₆H₂Br₃OH + 3HBr
Consider aromatic substitution
Check reactivity
Compare reaction rates
Students forget about aromatic substitution
Which of the following can be used to test the acidic nature of ethanol?
🥳 Wohoo! Correct answer
2CH₃CH₂OH + 2Na → 2CH₃CH₂ONa + H₂
Consider ethanol's weak acidity
Na metal can react with OH group
Produces H₂ gas and sodium ethoxide
Students often try conventional acid tests which won't work for very weak acids
😢 Uh oh! Incorrect answer, Try again
Look for reagent that can detect weak acids
2CH₃CH₂OH + 2Na → 2CH₃CH₂ONa + H₂
Consider ethanol's weak acidity
Na metal can react with OH group
Produces H₂ gas and sodium ethoxide
Students often try conventional acid tests which won't work for very weak acids
Propanoic acid undergoes HVZ reaction to give chloropropanoic acid. The product obtained is
🥳 Wohoo! Correct answer
CH₃CH₂COOH → CH₃CHClCOOH
Consider effect of Cl on acid strength
Electron-withdrawing Cl increases acid strength
α-chloro acid is stronger than parent acid
Students sometimes forget electronic effects of halogens
😢 Uh oh! Incorrect answer, Try again
Think about electronic effects of substituents
CH₃CH₂COOH → CH₃CHClCOOH
Consider effect of Cl on acid strength
Electron-withdrawing Cl increases acid strength
α-chloro acid is stronger than parent acid
Students sometimes forget electronic effects of halogens
Which of the following is generally water insoluble?
🥳 Wohoo! Correct answer
No specific formula required
Consider intermolecular forces
Fibrous proteins have hydrophobic interactions
These proteins are water insoluble
Students often assume all biomolecules are water soluble
😢 Uh oh! Incorrect answer, Try again
Think about protein structure and solubility
No specific formula required
Consider intermolecular forces
Fibrous proteins have hydrophobic interactions
These proteins are water insoluble
Students often assume all biomolecules are water soluble
Which of following is least soluble in water at 298K?
🥳 Wohoo! Correct answer
No specific formula required
Compare number of alkyl groups
Consider steric hindrance to H-bonding
(CH₃)₃N has most alkyl groups, least H-bonding
Students often only consider basicity, not solubility factors
😢 Uh oh! Incorrect answer, Try again
Consider effect of alkyl groups on H-bonding ability
No specific formula required
Compare number of alkyl groups
Consider steric hindrance to H-bonding
(CH₃)₃N has most alkyl groups, least H-bonding
Students often only consider basicity, not solubility factors
In nucleic acids, the nucleotides are joined together by
🥳 Wohoo! Correct answer
Sugar-O-P(O)(OH)-O-Sugar
Identify linkage between nucleotides
Phosphate forms two ester bonds
Forms backbone of nucleic acid structure
Students sometimes confuse with other biological linkages
😢 Uh oh! Incorrect answer, Try again
Remember phosphate connects sugar molecules
Sugar-O-P(O)(OH)-O-Sugar
Identify linkage between nucleotides
Phosphate forms two ester bonds
Forms backbone of nucleic acid structure
Students sometimes confuse with other biological linkages
Which of the following monomers can undergo condensation polymerization?
🥳 Wohoo! Correct answer
None
Check functional groups
Identify condensation
Compare monomers
Polymerization types
😢 Uh oh! Incorrect answer, Try again
Two different functional groups
None
Check functional groups
Identify condensation
Compare monomers
Polymerization types
Which of the following is not related to drug-enzyme interaction?
🥳 Wohoo! Correct answer
None
Compare terms
Check interactions
Identify mismatch
Drug interactions
😢 Uh oh! Incorrect answer, Try again
Antagonist relates to receptors
None
Compare terms
Check interactions
Identify mismatch
Drug interactions
Anti-histamine among the following is
🥳 Wohoo! Correct answer
No specific formula required
Identify drug categories
Anti-histamines block histamine receptors
Bromopheneramine is specifically an antihistamine drug
Students sometimes confuse antibiotics with antihistamines
😢 Uh oh! Incorrect answer, Try again
Remember common antihistamine drug names
No specific formula required
Identify drug categories
Anti-histamines block histamine receptors
Bromopheneramine is specifically an antihistamine drug
Students sometimes confuse antibiotics with antihistamines
Cis-1,4-polyisoprene is called
🥳 Wohoo! Correct answer
[CH₂-C(CH₃)=CH-CH₂]ₙ in cis configuration
Identify structure of polyisoprene
Natural rubber has cis-1,4 configuration of polyisoprene
Natural rubber is specifically cis-1,4-polyisoprene
Students often confuse between synthetic and natural rubber structures
😢 Uh oh! Incorrect answer, Try again
Remember natural rubber's specific isomeric form
[CH₂-C(CH₃)=CH-CH₂]ₙ in cis configuration
Identify structure of polyisoprene
Natural rubber has cis-1,4 configuration of polyisoprene
Natural rubber is specifically cis-1,4-polyisoprene
Students often confuse between synthetic and natural rubber structures
The polymer containing five methylene groups in its repeating unit is
🥳 Wohoo! Correct answer
[-NH-(CH₂)₅-CO-]ₙ for Nylon 6
Identify structure of each polymer
Count methylene (-CH₂-) groups in repeating units
Nylon 6 has exactly five methylene groups in its monomer unit
Students often confuse between Nylon 6 and Nylon 6,6 structures
😢 Uh oh! Incorrect answer, Try again
Count the number of -CH₂- groups in each polymer's repeating unit
[-NH-(CH₂)₅-CO-]ₙ for Nylon 6
Identify structure of each polymer
Count methylene (-CH₂-) groups in repeating units
Nylon 6 has exactly five methylene groups in its monomer unit
Students often confuse between Nylon 6 and Nylon 6,6 structures
The vitamin that helps in clotting of blood is
🥳 Wohoo! Correct answer
No specific formula required
Identify functions of different vitamins
Vitamin K is essential for synthesis of prothrombin required for blood clotting
Vitamin K deficiency leads to delayed blood clotting
Students sometimes confuse with vitamin C due to its general importance
😢 Uh oh! Incorrect answer, Try again
Remember K for Koagulation (German spelling)
No specific formula required
Identify functions of different vitamins
Vitamin K is essential for synthesis of prothrombin required for blood clotting
Vitamin K deficiency leads to delayed blood clotting
Students sometimes confuse with vitamin C due to its general importance
A food additive that acts as an antioxidant is
🥳 Wohoo! Correct answer
None
Identify function
Check structure
Compare additives
Food additives
😢 Uh oh! Incorrect answer, Try again
Prevents oxidation
None
Identify function
Check structure
Compare additives
Food additives
Which of the following polymer has strongest intermolecular forces of attraction?
🥳 Wohoo! Correct answer
None
Compare structures
Check functional groups
Analyze forces
Intermolecular forces
😢 Uh oh! Incorrect answer, Try again
Presence of ester linkages
None
Compare structures
Check functional groups
Analyze forces
Intermolecular forces
Which one of the following vitamins is not stored in adipose tissue?
🥳 Wohoo! Correct answer
None
Check solubility
Identify water-soluble
Compare storage
Vitamin classification
😢 Uh oh! Incorrect answer, Try again
Water-soluble vs fat-soluble
None
Check solubility
Identify water-soluble
Compare storage
Vitamin classification
C₁-C₄ glycosidic bond is NOT found in
🥳 Wohoo! Correct answer
None
Check bond types
Identify sugar units
Compare linkages
Glycosidic bonds
😢 Uh oh! Incorrect answer, Try again
Sucrose has C₁-C₂ linkage
None
Check bond types
Identify sugar units
Compare linkages
Glycosidic bonds
Hinsberg's reagent is
🥳 Wohoo! Correct answer
None
Identify structure
Check reactivity
Remember reagent
Reagent identification
😢 Uh oh! Incorrect answer, Try again
Used for amine distinction
None
Identify structure
Check reactivity
Remember reagent
Reagent identification
Hypothyroidism is caused by the deficiency of
🥳 Wohoo! Correct answer
None
Identify hormone
Check function
Link to condition
Hormone functions
😢 Uh oh! Incorrect answer, Try again
Thyroid hormone deficiency
None
Identify hormone
Check function
Link to condition
Hormone functions
Which of the following on heating gives an ether as major products? P: C₆H₅CH₂Br + CH₃ONa Q: C₆H₅ONa + CH₃Br R: (CH₃)₃CCl + CH₃ONa S: C₆H₅CH=CHCl + CH₃ONa
🥳 Wohoo! Correct answer
RX + R'O⁻Na⁺ → ROR' + NaX
Identify SN2 reactions
Check substrate types
Determine major products
SN1 vs SN2
😢 Uh oh! Incorrect answer, Try again
Primary halides favor SN2
RX + R'O⁻Na⁺ → ROR' + NaX
Identify SN2 reactions
Check substrate types
Determine major products
SN1 vs SN2
The steps involved in the conversion of propan-2-ol to propan-1-ol are in the order
🥳 Wohoo! Correct answer
None
Convert to alkene
Form borane adduct
Oxidize to alcohol
Reaction sequence
😢 Uh oh! Incorrect answer, Try again
Consider regioselectivity
None
Convert to alkene
Form borane adduct
Oxidize to alcohol
Reaction sequence
The carbonyl compound that does not undergo aldol condensation is
🥳 Wohoo! Correct answer
None
Check α-hydrogen
Compare reactivity
Identify inert compound
Aldol mechanism
😢 Uh oh! Incorrect answer, Try again
No α-hydrogen, no aldol
None
Check α-hydrogen
Compare reactivity
Identify inert compound
Aldol mechanism
Which of the following halide shows highest reactivity towards SN1 reaction?
🥳 Wohoo! Correct answer
None
Compare carbocation stability
Check leaving groups
Determine rate determining step
SN1 vs SN2 mechanism
😢 Uh oh! Incorrect answer, Try again
Benzyl carbocation is stable
None
Compare carbocation stability
Check leaving groups
Determine rate determining step
SN1 vs SN2 mechanism
Complementary chain to GATGC in nucleic acid
🥳 Wohoo! Correct answer
A=T, G≡C
Apply base pairing rules
Write complementary sequence
Check Watson-Crick pairs
Forgetting base pairs
😢 Uh oh! Incorrect answer, Try again
Know DNA base pairing
A=T, G≡C
Apply base pairing rules
Write complementary sequence
Check Watson-Crick pairs
Forgetting base pairs
Most suitable reagent for: CH₃-CH=CH-CH₂-C(=O)-CH₃ → CH₃-CH=CH-CH₂-C(=O)-OH
🥳 Wohoo! Correct answer
RCOCH₃ + I₂/OH⁻ → RCOOH + CHI₃
Check for α-H
I₂/NaOH gives iodoform
Acidification gives acid
Missing mechanism steps
😢 Uh oh! Incorrect answer, Try again
Look for α-methyl ketone
RCOCH₃ + I₂/OH⁻ → RCOOH + CHI₃
Check for α-H
I₂/NaOH gives iodoform
Acidification gives acid
Missing mechanism steps
RNA and DNA chirality is due to
🥳 Wohoo! Correct answer
C₅H₁₀O₅ structure
Check sugar structure
Identify chiral centers
Understand biomolecule structure
Confusing D/L nomenclature
😢 Uh oh! Incorrect answer, Try again
Know nucleic acid components
C₅H₁₀O₅ structure
Check sugar structure
Identify chiral centers
Understand biomolecule structure
Confusing D/L nomenclature
Which of the following is correctly matched?
🥳 Wohoo! Correct answer
Phenol + HCHO → Novolac
Recall polymer types
Match polymer-monomer pairs
Bakelite is phenol-formaldehyde polymer
Confusing polymer-monomer relationships
😢 Uh oh! Incorrect answer, Try again
Know common polymer types
Phenol + HCHO → Novolac
Recall polymer types
Match polymer-monomer pairs
Bakelite is phenol-formaldehyde polymer
Confusing polymer-monomer relationships
Reagent which can convert CH₃COOH → CH₃-CH₂-OH is
🥳 Wohoo! Correct answer
RCOOH + LiAlH₄ → RCH₂OH
Check reducing power
LiAlH₄ reduces acid to alcohol
Other reagents insufficient
Confusing reducing agents
😢 Uh oh! Incorrect answer, Try again
Look for strongest reducer
RCOOH + LiAlH₄ → RCH₂OH
Check reducing power
LiAlH₄ reduces acid to alcohol
Other reagents insufficient
Confusing reducing agents
Organic compound 'X' on treatment with PCC in dichloromethane gives compound Y. Y reacts with I₂ and alkali to form yellow precipitate of triiodomethane. X is
🥳 Wohoo! Correct answer
CH₃CH₂OH → CH₃CHO → CHI₃
PCC oxidizes primary alcohol to aldehyde
Aldehyde gives iodoform test
Primary alcohol is original compound
Confusing oxidation products
😢 Uh oh! Incorrect answer, Try again
Look for compound giving +ve iodoform test
CH₃CH₂OH → CH₃CHO → CHI₃
PCC oxidizes primary alcohol to aldehyde
Aldehyde gives iodoform test
Primary alcohol is original compound
Confusing oxidation products
Identify A and B in the reaction given for propene with HBr/peroxide and HI
🥳 Wohoo! Correct answer
Free radical mechanism
Consider mechanism
Apply Markovnikov/anti-Markovnikov rules
Peroxide effect with HBr
Confusing addition rules
😢 Uh oh! Incorrect answer, Try again
Anti-Markovnikov for HBr/peroxide
Free radical mechanism
Consider mechanism
Apply Markovnikov/anti-Markovnikov rules
Peroxide effect with HBr
Confusing addition rules
A Nucleic acid, on complete hydrolysis, gives purines, pyrimidines, pentose sugar and phosphoric acid. Nucleotides which are intermediate products contain
🥳 Wohoo! Correct answer
Base + Sugar + Phosphate = Nucleotide
Understand nucleotide composition
Identify all components
Nucleotide has all three parts
Confusing nucleotide components
😢 Uh oh! Incorrect answer, Try again
Nucleotide is basic unit of nucleic acids
Base + Sugar + Phosphate = Nucleotide
Understand nucleotide composition
Identify all components
Nucleotide has all three parts
Confusing nucleotide components
The test to differentiate between pentan-2-one and pentan-3-one is
🥳 Wohoo! Correct answer
CH₃CO- + I₂/NaOH → CHI₃ (yellow ppt)
Identify methyl ketone
Only pentan-2-one has CH₃CO- group
Iodoform test is positive for CH₃CO-
Confusing different carbonyl tests
😢 Uh oh! Incorrect answer, Try again
Iodoform test specific for methyl ketones
CH₃CO- + I₂/NaOH → CHI₃ (yellow ppt)
Identify methyl ketone
Only pentan-2-one has CH₃CO- group
Iodoform test is positive for CH₃CO-
Confusing different carbonyl tests
A secondary amine is
🥳 Wohoo! Correct answer
R₂NH structure
Identify amine types
Count H atoms replaced
R₂NH is secondary amine
Confusing primary/secondary/tertiary amines
😢 Uh oh! Incorrect answer, Try again
Secondary means two H's replaced
R₂NH structure
Identify amine types
Count H atoms replaced
R₂NH is secondary amine
Confusing primary/secondary/tertiary amines
The general name of the compound formed by the reaction between aldehyde and alcohol is
🥳 Wohoo! Correct answer
RCHO + 2R'OH → RCH(OR')₂ + H₂O
Write hemiacetal formation
Further reaction with alcohol
Forms acetal
Confusing hemiacetal and acetal
😢 Uh oh! Incorrect answer, Try again
Two-step addition of alcohols
RCHO + 2R'OH → RCH(OR')₂ + H₂O
Write hemiacetal formation
Further reaction with alcohol
Forms acetal
Confusing hemiacetal and acetal
Ethanoic acid undergoes Hell-Volhard Zelinsky reaction but Methanoic acid does not, because of
🥳 Wohoo! Correct answer
CH₃COOH has α-H, HCOOH doesn't
Identify α-hydrogen
Compare structures
Ethanoic acid has α-H, methanoic doesn't
Confusing α-hydrogen position
😢 Uh oh! Incorrect answer, Try again
HVZ reaction requires α-hydrogen
CH₃COOH has α-H, HCOOH doesn't
Identify α-hydrogen
Compare structures
Ethanoic acid has α-H, methanoic doesn't
Confusing α-hydrogen position
In Kolbes reaction the reacting substances are
🥳 Wohoo! Correct answer
C₆H₅ONa + CO₂ → o-HOC₆H₄COOH
Recall Kolbe-Schmitt reaction
Identify reactants
CO₂ reacts with sodium phenoxide
Confusing with other named reactions
😢 Uh oh! Incorrect answer, Try again
Carboxylation occurs at ortho position
C₆H₅ONa + CO₂ → o-HOC₆H₄COOH
Recall Kolbe-Schmitt reaction
Identify reactants
CO₂ reacts with sodium phenoxide
Confusing with other named reactions
In Carbylamine test for primary amines the resulting foul smelling product is
🥳 Wohoo! Correct answer
RNH₂ + CHCl₃ + 3KOH → RNC + 3KCl + 3H₂O
Write carbylamine reaction
Primary amine + CHCl₃ + KOH
Forms isocyanide (RNC)
Confusing products of amine tests
😢 Uh oh! Incorrect answer, Try again
Characteristic test for primary amines
RNH₂ + CHCl₃ + 3KOH → RNC + 3KCl + 3H₂O
Write carbylamine reaction
Primary amine + CHCl₃ + KOH
Forms isocyanide (RNC)
Confusing products of amine tests
Among the following, the products formed by the reaction of anisole with HI are
🥳 Wohoo! Correct answer
C₆H₅OCH₃ + HI → C₆H₅OH + CH₃I
Write structure of anisole
Consider cleavage of C-O bond
HI cleaves ether linkage
Confusing products of ether cleavage
😢 Uh oh! Incorrect answer, Try again
C-O bond cleavage gives phenol and alkyl iodide
C₆H₅OCH₃ + HI → C₆H₅OH + CH₃I
Write structure of anisole
Consider cleavage of C-O bond
HI cleaves ether linkage
Confusing products of ether cleavage
Which gas converts haemoglobin into carboxy haemoglobin?
🥳 Wohoo! Correct answer
Hb + CO → HbCO
Identify binding site
Compare affinity
Check stability
Gas affinity confusion
😢 Uh oh! Incorrect answer, Try again
Strong metal-CO bond
Hb + CO → HbCO
Identify binding site
Compare affinity
Check stability
Gas affinity confusion
Receptors crucial to body communication process are embedded in
🥳 Wohoo! Correct answer
Membrane proteins
Analyze location
Check function
Consider structure
Location confusion
😢 Uh oh! Incorrect answer, Try again
Signal transmission
Membrane proteins
Analyze location
Check function
Consider structure
Location confusion
Which monomers form biodegradable polymers?
🥳 Wohoo! Correct answer
PHBV formation
Check structure
Consider degradability
Analyze bonds
Biodegradability confusion
😢 Uh oh! Incorrect answer, Try again
Natural occurrence
PHBV formation
Check structure
Consider degradability
Analyze bonds
Biodegradability confusion
Match deficiency effects: Vitamin A-Night blindness, D-Osteomalacia, E-Muscular weakness, K-Blood clotting time
🥳 Wohoo! Correct answer
Vitamin functions
Match symptoms
Verify functions
Connect effects
Function matching confusion
😢 Uh oh! Incorrect answer, Try again
Consider vitamin roles
Vitamin functions
Match symptoms
Verify functions
Connect effects
Function matching confusion
Which is a non-narcotic analgesic?
🥳 Wohoo! Correct answer
Pain relievers
Compare drug types
Check structure
Verify properties
Drug classification confusion
😢 Uh oh! Incorrect answer, Try again
Consider addiction potential
Pain relievers
Compare drug types
Check structure
Verify properties
Drug classification confusion
Why sucrose is dextrorotatory but shows laevorotation after hydrolysis
🥳 Wohoo! Correct answer
C₁₂H₂₂O₁₁ + H₂O → C₆H₁₂O₆ + C₆H₁₂O₆
Consider hydrolysis products
Compare rotations
Analyze net effect
Rotation addition confusion
😢 Uh oh! Incorrect answer, Try again
Specific rotation values
C₁₂H₂₂O₁₁ + H₂O → C₆H₁₂O₆ + C₆H₁₂O₆
Consider hydrolysis products
Compare rotations
Analyze net effect
Rotation addition confusion
Thyroxine produced in thyroid gland is iodinated derivative of
🥳 Wohoo! Correct answer
Amino acid derivative
Identify amino acid
Check structure
Consider function
Amino acid confusion
😢 Uh oh! Incorrect answer, Try again
Hormone precursor
Amino acid derivative
Identify amino acid
Check structure
Consider function
Amino acid confusion
SN1 or SN2 reaction of a haloalkane depends on:
🥳 Wohoo! Correct answer
Polar protic solvents stabilize SN1 carbocations; aprotic favor SN2 nucleophiles.
Reaction mechanism depends on the polarity and protic/aprotic nature of the solvent.
Classify solvent as polar protic (favoring SN1) or polar aprotic (favoring SN2).
Correct: SN1 or SN2 determined by solvent type.
Overlooking solvent role in mechanism choice.
😢 Uh oh! Incorrect answer, Try again
Consider solvent polarity and its effect on carbocation stability.
Polar protic solvents stabilize SN1 carbocations; aprotic favor SN2 nucleophiles.
Reaction mechanism depends on the polarity and protic/aprotic nature of the solvent.
Classify solvent as polar protic (favoring SN1) or polar aprotic (favoring SN2).
Correct: SN1 or SN2 determined by solvent type.
Overlooking solvent role in mechanism choice.
PCC is:
🥳 Wohoo! Correct answer
PCC: C₅H₅NH⁺CrO₃Cl⁻
PCC refers to pyridinium chlorochromate, a mild oxidizing agent used to oxidize alcohols to aldehydes or ketones.
Recognize PCC as a complex containing CrO₃, pyridine, and HCl.
PCC structure is pyridinium chlorochromate (C₅H₅NH⁺CrO₃Cl⁻).
Misinterpreting PCC's composition and function.
😢 Uh oh! Incorrect answer, Try again
Recall mild oxidation reagents like PCC.
PCC: C₅H₅NH⁺CrO₃Cl⁻
PCC refers to pyridinium chlorochromate, a mild oxidizing agent used to oxidize alcohols to aldehydes or ketones.
Recognize PCC as a complex containing CrO₃, pyridine, and HCl.
PCC structure is pyridinium chlorochromate (C₅H₅NH⁺CrO₃Cl⁻).
Misinterpreting PCC's composition and function.
Tertiary alcohol (C₄H₁₀O) reacts with 20% H₃PO₄ at 358 K to yield a major product (C₄H₈). Identify the compound.
🥳 Wohoo! Correct answer
Dehydration of alcohol: R–C(OH)–R → R=CH₂ + H₂O
Reaction involves dehydration of tertiary alcohol to form an alkene (major product).
Dehydration: tertiary alcohol loses water to form 2-methylpropene as the major alkene product.
Final product is 2-methylpropene (C₄H₈).
Confusion in determining major alkene product (Zaitsev's rule).
😢 Uh oh! Incorrect answer, Try again
Recognize dehydration patterns for tertiary alcohols.
Dehydration of alcohol: R–C(OH)–R → R=CH₂ + H₂O
Reaction involves dehydration of tertiary alcohol to form an alkene (major product).
Dehydration: tertiary alcohol loses water to form 2-methylpropene as the major alkene product.
Final product is 2-methylpropene (C₄H₈).
Confusion in determining major alkene product (Zaitsev's rule).
8.8 g of monohydric alcohol liberates 2240 cm³ of ethane at STP. Oxidation forms a carbonyl compound answering Tollen’s test. Identify the alcohol.
🥳 Wohoo! Correct answer
Use STP gas laws: 1 mol gas = 22400 cm³; calculate molar ratios and products.
8.8 g alcohol reacts to produce 2240 cm³ ethane, indicating a primary alcohol (oxidized to aldehyde).
Use weight-volume relations to deduce molar mass and identity of alcohol.
Final alcohol is 2,2-dimethylpropan-1-ol (primary alcohol).
Misidentifying alcohol type (primary/secondary).
😢 Uh oh! Incorrect answer, Try again
Recognize characteristics of primary alcohols under oxidation.
Use STP gas laws: 1 mol gas = 22400 cm³; calculate molar ratios and products.
8.8 g alcohol reacts to produce 2240 cm³ ethane, indicating a primary alcohol (oxidized to aldehyde).
Use weight-volume relations to deduce molar mass and identity of alcohol.
Final alcohol is 2,2-dimethylpropan-1-ol (primary alcohol).
Misidentifying alcohol type (primary/secondary).
The female sex hormone responsible for development of secondary characteristics and menstrual cycle control is:
🥳 Wohoo! Correct answer
Hormonal roles: Estrogen (Estradiol) responsible for secondary characteristics.
The hormone responsible is estradiol, which is a key estrogen in female reproductive development.
Recognize that estradiol contributes to female secondary sexual traits and the menstrual cycle.
Correct hormone is Estradiol.
Confusing estradiol with other steroidal hormones.
😢 Uh oh! Incorrect answer, Try again
Focus on key hormones in female reproduction.
Hormonal roles: Estrogen (Estradiol) responsible for secondary characteristics.
The hormone responsible is estradiol, which is a key estrogen in female reproductive development.
Recognize that estradiol contributes to female secondary sexual traits and the menstrual cycle.
Correct hormone is Estradiol.
Confusing estradiol with other steroidal hormones.
In the reaction sequence C₂H₅Cl → C₂H₅F → CH₂=CH₂ → C₄H₁₀, the reagents are:
🥳 Wohoo! Correct answer
HgF₂ for halide exchange; Alcoholic KOH for dehydrohalogenation; Na in dry ether for coupling.
Understand the conversion of C₂H₅Cl to C₂H₅F (by HgF₂), then to CH₂=CH₂ (dehydrohalogenation with alcoholic KOH), followed by Wurtz reaction.
Follow reaction mechanisms stepwise: halogen exchange → elimination → coupling via Wurtz reaction.
Reactions yield butane (C₄H₁₀) via Wurtz reaction.
Misinterpreting reagent functionality for fluorination or Wurtz reaction.
😢 Uh oh! Incorrect answer, Try again
Carefully trace reagents and sequence of steps.
HgF₂ for halide exchange; Alcoholic KOH for dehydrohalogenation; Na in dry ether for coupling.
Understand the conversion of C₂H₅Cl to C₂H₅F (by HgF₂), then to CH₂=CH₂ (dehydrohalogenation with alcoholic KOH), followed by Wurtz reaction.
Follow reaction mechanisms stepwise: halogen exchange → elimination → coupling via Wurtz reaction.
Reactions yield butane (C₄H₁₀) via Wurtz reaction.
Misinterpreting reagent functionality for fluorination or Wurtz reaction.
α-D-(+)-glucose and β-D-(+)-glucose are...
🥳 Wohoo! Correct answer
No specific formula.
α-D-(+)-glucose and β-D-(+)-glucose are anomers differing at the anomeric carbon (C1), where the –OH group orientation varies.
Both belong to the D-glucose family but differ in their C1 position (α/β).
Final result: They are Anomers.
Confusing anomers with epimers or enantiomers.
😢 Uh oh! Incorrect answer, Try again
Differentiate anomers from other stereoisomers.
No specific formula.
α-D-(+)-glucose and β-D-(+)-glucose are anomers differing at the anomeric carbon (C1), where the –OH group orientation varies.
Both belong to the D-glucose family but differ in their C1 position (α/β).
Final result: They are Anomers.
Confusing anomers with epimers or enantiomers.
The type of linkage present between nucleotides is...
🥳 Wohoo! Correct answer
Phosphodiester linkage = Sugar-phosphate backbone
Nucleotides in DNA and RNA are joined by phosphodiester bonds between the 3′ hydroxyl group of one sugar and the 5′ phosphate group of another.
Linkage ensures the formation of the sugar-phosphate backbone.
Final result: Linkage between nucleotides is Phosphodiester linkage.
Misidentifying amide or glycosidic bonds in nucleotides.
😢 Uh oh! Incorrect answer, Try again
Recall the structure of DNA and RNA linkages.
Phosphodiester linkage = Sugar-phosphate backbone
Nucleotides in DNA and RNA are joined by phosphodiester bonds between the 3′ hydroxyl group of one sugar and the 5′ phosphate group of another.
Linkage ensures the formation of the sugar-phosphate backbone.
Final result: Linkage between nucleotides is Phosphodiester linkage.
Misidentifying amide or glycosidic bonds in nucleotides.
The biodegradable polymer obtained by polymerization of Glycine and Aminocaproic acid is...
🥳 Wohoo! Correct answer
Polymerization reactions basics.
Nylon 2–Nylon 6 is a biodegradable copolymer formed by condensation polymerization of Glycine and Aminocaproic acid.
Reaction: Glycine + Aminocaproic acid → Nylon 2–Nylon 6.
Final result: Biodegradable polymer is Nylon 2–Nylon 6.
Confusing Nylon-6 with biodegradable polymers like PHBV.
😢 Uh oh! Incorrect answer, Try again
Recall examples of biodegradable synthetic polymers.
Polymerization reactions basics.
Nylon 2–Nylon 6 is a biodegradable copolymer formed by condensation polymerization of Glycine and Aminocaproic acid.
Reaction: Glycine + Aminocaproic acid → Nylon 2–Nylon 6.
Final result: Biodegradable polymer is Nylon 2–Nylon 6.
Confusing Nylon-6 with biodegradable polymers like PHBV.
In the reaction: Aniline → NaNO₂/dil.HCl → Phenol → NaOH → P → Q
🥳 Wohoo! Correct answer
Diazonium ion formation: ArNH₂ + NaNO₂ + HCl → ArN₂⁺Cl⁻
Reaction involves diazotization of aniline, coupling with phenol, and further treatment with NaOH to form para-hydroxyazobenzene.
Diazotization: C₆H₅NH₂ → NaNO₂, dil. HCl → C₆H₅N₂Cl → coupling with phenol forms the desired product.
The final product is para-hydroxyazobenzene.
Confusion between isomers ortho/para in coupling reactions.
😢 Uh oh! Incorrect answer, Try again
Recall diazotization and coupling reactions.
Diazonium ion formation: ArNH₂ + NaNO₂ + HCl → ArN₂⁺Cl⁻
Reaction involves diazotization of aniline, coupling with phenol, and further treatment with NaOH to form para-hydroxyazobenzene.
Diazotization: C₆H₅NH₂ → NaNO₂, dil. HCl → C₆H₅N₂Cl → coupling with phenol forms the desired product.
The final product is para-hydroxyazobenzene.
Confusion between isomers ortho/para in coupling reactions.
Which of the following set of polymers are used as fiber?
🥳 Wohoo! Correct answer
No specific formula.
Terylene and Orlon are classified as synthetic fibers due to their high tensile strength and elasticity.
Starch is a natural polymer and does not behave as a fiber.
Final result: Polymers used as fibers are Terylene and Orlon.
Confusing synthetic polymers like Teflon with fiber-forming ones.
😢 Uh oh! Incorrect answer, Try again
Recall fiber properties of synthetic polymers.
No specific formula.
Terylene and Orlon are classified as synthetic fibers due to their high tensile strength and elasticity.
Starch is a natural polymer and does not behave as a fiber.
Final result: Polymers used as fibers are Terylene and Orlon.
Confusing synthetic polymers like Teflon with fiber-forming ones.
Biologically active adrenaline and ephedrine contain...
🥳 Wohoo! Correct answer
Secondary amine = R-NH-R’
Adrenaline and Ephedrine have secondary amines (-NH-) that increase blood pressure and act as stimulants.
Reaction mechanisms align with secondary amine reactivity in biochemistry.
Final result: Amino group is Secondary.
Confusing primary/tertiary amines with secondary ones.
😢 Uh oh! Incorrect answer, Try again
Recall functional groups in biologically active amines.
Secondary amine = R-NH-R’
Adrenaline and Ephedrine have secondary amines (-NH-) that increase blood pressure and act as stimulants.
Reaction mechanisms align with secondary amine reactivity in biochemistry.
Final result: Amino group is Secondary.
Confusing primary/tertiary amines with secondary ones.