General
✓✗What is the IUPAC name of the product formed when acetone reacts with (i) C2H5MgBr in dry ether, then (ii) H2O, H+?
- 2-Methylbutan-2-ol
- Pentan-2-ol
- Pentan-3-ol
- 2-Methylpropan-2-ol
General
✓✗Butanal reacts with HCN to give a cyanohydrin that is
- a meso compound
- achiral
- a single enantiomer
- a racemic mixture (optically inactive)
General
✓✗Alkylbenzenes are oxidised to benzoic acid by
- alkaline or acidic KMnO4
- H2/Pd
- NaBH4
- PCC
General
✓✗Match List I (reaction) with List II (reagents/conditions).
Choose the correct answer from the options given below.
| List I | List II |
| A. Cyclohexylidenecyclohexane → 2 cyclohexanone | I. C6H5COCl/anhyd. AlCl3 |
| B. Benzene → benzophenone | II. CrO3 |
| C. Cyclohexanol → cyclohexanone | III. KMnO4/KOH, heat |
| D. Ethylbenzene → potassium benzoate | IV. (i) O3; (ii) Zn−H2O |
- A-I, B-IV, C-II, D-III
- A-IV, B-I, C-II, D-III
- A-IV, B-I, C-III, D-II
- A-III, B-I, C-II, D-IV
General
✓✗Benzoic acid on nitration with conc. HNO3 and conc. H2SO4 gives mainly
- 2-nitrobenzoic acid
- 3-nitrobenzoic acid
- 4-nitrobenzoic acid
- nitrobenzene
General
✓✗The major product of the reaction C6H5COCH2CH2CN \( \xrightarrow{\;\text{(i) CH}_3\text{MgBr (excess);\;(ii) H}_3\text{O}^+\;} \) is
- C6H5COCH2CH2COCH3
- C6H5C(OH)(CH3)CH2CH2C(OH)(CH3)2
- C6H5C(OH)(CH3)CH2CH2COCH3
- C6H5C(OH)(CH3)CH2CH2CN
General
✓✗Which of the following is the strongest acid?
- 4-Methylbenzoic acid
- 3,5-Dinitrobenzoic acid
- 3-Nitrobenzoic acid
- Benzoic acid
General
✓✗Addition of HCN to aldehydes and ketones gives
- acetals
- cyanohydrins
- oximes
- hydrazones
General
✓✗In which of the following does the number of carbon atoms NOT remain the same when a carboxylic acid is obtained by oxidation?
- CCl3CH2CHO
- CH3COCH3
- CH3CH2CHO
- CH3CH2CH2OH
General
✓✗The reaction of ethanal with HCN followed by hydrolysis gives
- propanoic acid
- 3-hydroxypropanoic acid
- 2-hydroxypropanoic acid (lactic acid)
- ethanoic acid
General
✓✗Which one of the following can be oxidised to the corresponding carbonyl compound?
- o-Nitrophenol
- 2-Methyl-2-hydroxypropane
- Phenol
- 2-Hydroxypropane
General
✓✗Compound A (C4H8O) gives a 2,4-DNP derivative and a positive iodoform test but no silver mirror. A is
- 2-methylpropanal
- butanal
- butan-2-one
- but-3-en-2-ol
General
✓✗How many products (aldols, ignoring stereoisomers) can be formed in a cross aldol reaction between ethanal and propanal?
- 1
- 3
- 2
- 4
General
✓✗Which carbonyl compound gives a primary alcohol with a Grignard reagent?
- Methanal
- Ethanal
- Propanone
- Benzaldehyde
General
✓✗Statement I: Benzaldehyde undergoes crossed Cannizzaro reaction with formaldehyde to give benzyl alcohol.
Statement II: In this reaction, formaldehyde is reduced to methanol.
Statement II: In this reaction, formaldehyde is reduced to methanol.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct