Aldehydes, Ketones and Carboxylic Acids

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is

1. hydrazine in presence of feebly acidic solution
2. hydrocyanic acid
3. sodium hydrogen sulphate
4. a Grignard reagent.

Which one of the following esters gets hydrolysed most easily under alkaline conditions?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Treatment of cyclopentanone [figure] with methyl lithium gives which of the following species ?

1. Cyclopentanonyl radical
2. Cyclopentanonyl biradical
3. Cyclopentanonyl anion
4. Cyclopentanonyl cation

An organic compound 'X' having molecular formula C5H10O yields phenylhydrazone and gives negative response to the iodoform test and Tollens' test. It produces n-pentane on reduction. 'X' could be

1. 3-pentanone
2. n-amyl alcohol
3. pentanal
4. 2-pentanone

Which one is most reactive towards nucleophilic addition reaction?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Reaction by which benzaldehyde cannot be prepared

1. [figure] + CO + HCl in presence of anhydrous AlCl3
2. [figure] + Zn/Hg and conc. HCl
3. [figure] + CrO2Cl2 in CS2 followed by H3O+
4. [figure] + H2 in presence of Pd-BaSO4

In the following reaction: HC CH [Hg2+]H2SO4 'P' Product 'P' will not give

1. Tollen's reagent test
2. Brady's reagent test
3. Victor Meyer test
4. Iodoform test

Consider the reaction : RCHO + NH2NH2 RCH = N - NH2 What sort of reaction is it?

1. Electrophilic addition-elimination reaction
2. Free radical addition-elimination reaction
3. Electrophilic substitution-elimination reaction
4. Nucleophilic addition-elimination reaction

Which of the following compounds will give a yellow precipitate with iodine and alkali?

1. Acetophenone
2. Methyl acetate
3. Acetamide
4. 2-Hydroxypropane

Consider the following reaction [figure] The product A is

1. C6H5CHO
2. C6H5OH
3. C6H5COCH3
4. C6H5Cl