General
✓✗The order of boiling points of propanal, propan-1-ol and propanoic acid is
- all equal
- propan-1-ol > propanoic acid > propanal
- propanal > propan-1-ol > propanoic acid
- propanoic acid > propan-1-ol > propanal
General
✓✗An organic compound A (C3H6O) gives a positive iodoform test but does not reduce Tollens’ reagent. A on reduction with NaBH4 gives B. B is
- propan-2-ol
- propanal
- propan-1-ol
- propene
General
✓✗Identify D: CH3CHO \( \xrightarrow{\;\text{(i) LiAlH}_4\text{;\;(ii) H}_3\text{O}^+\;} \) A \( \xrightarrow{\;\text{H}_2\text{SO}_4,\,\Delta\;} \) B \( \xrightarrow{\;\text{HBr}\;} \) C; C + bromobenzene \( \xrightarrow{\;\text{Na/dry ether}\;} \) D.
- Biphenyl
- HC≡C−Na+
- Ethylbenzene
- C4H10
General
✓✗Addition of HCN to aldehydes and ketones gives
- acetals
- cyanohydrins
- oximes
- hydrazones
General
✓✗Which one of the following products is formed when adipic acid (hexanedioic acid) is heated (with a little Ba(OH)2)?
- succinic anhydride
- unchanged adipic acid
- adipic anhydride (a seven-membered cyclic anhydride)
- cyclopentanone
General
✓✗RMgX + CO2 \( \xrightarrow{\;\text{dry ether}\;} \) Y \( \xrightarrow{\;\text{H}_3\text{O}^+\;} \) RCOOH. What is Y?
- (RCOO)2Mg
- RCOO−X+
- R3CO−Mg+X
- RCOO−Mg+X
General
✓✗Toluene \( \xrightarrow{\;\text{Cl}_2,\,h\nu\text{ (2 mol)}\;} \) A \( \xrightarrow{\;\text{H}_2\text{O, 373 K}\;} \) B. B is
- benzyl alcohol
- o-chlorotoluene
- benzoic acid
- benzaldehyde
General
✓✗Hydration of propyne in the presence of HgSO4/H2SO4 gives
- propanoic acid
- propanone
- propanal
- propan-1-ol
General
✓✗Which one of the following is most reactive towards an electrophilic reagent?
- (2-methylphenyl)methanol
- 2-methylphenol (o-cresol)
- 2-methylanisole (1-methoxy-2-methylbenzene)
- N-(2-methylphenyl)acetamide
General
✓✗Aldehydes and ketones react with semicarbazide to form
- hydrazones
- cyanohydrins
- semicarbazones
- oximes
General
✓✗Acyl chlorides react with dialkylcadmium to give
- aldehydes
- alcohols
- esters
- ketones
General
✓✗Oxidation of toluene with CrO3 in acetic anhydride followed by hydrolysis gives
- benzyl alcohol
- benzoic acid
- benzaldehyde
- phenol
General
✓✗The correct order of acidity is
- 2-chlorobutanoic acid > 3-chlorobutanoic acid > 4-chlorobutanoic acid > butanoic acid
- 4-chlorobutanoic acid > 3-chlorobutanoic acid > 2-chlorobutanoic acid > butanoic acid
- butanoic acid > 2-chlorobutanoic acid > 3-chlorobutanoic acid > 4-chlorobutanoic acid
- 3-chlorobutanoic acid > 2-chlorobutanoic acid > 4-chlorobutanoic acid > butanoic acid
General
✓✗In the Wolff−Kishner reduction, the carbonyl group is reduced to CH2 by
- LiAlH4
- H2/Pd
- Zn−Hg and conc. HCl
- hydrazine followed by heating with KOH in ethylene glycol
General
✓✗Clemmensen reduction is NOT suitable for compounds that are
- aromatic ketones
- aldehydes
- sensitive to base
- sensitive to acid