Carboxylic acids are more acidic than phenol and alcohol because of 

1. formations of dimers

2. highly acidic hydrogen

3. resonance stabilization of their conjugate base

4. intermolecular hydrogen bonding 

Acetaldehyde cannot exhibit

1. Iodoform test

2. Benedict's test

3. Lucas test

4. Tollen's test

Ketones$\left({\mathrm{R}}_1{\mathrm{COR}}_2\right)$; ${\mathrm{R}}_1={\mathrm{R}}_2=$alkyl groups, can be obtained in one step by:

1. hydrolysis of esters

2. oxidation of primary alcohols

3. oxidation of secondary alcohols

4. reaction of acid halides and alcohols

The product formed by the reaction of chlorine with benzaldehyde in the absence of catalyst is

1. benzoyl chloride

2. benzyl chloride

3. chlorobenzene

4. o-chlorobenzaldehyde

When ethanal is heated with Fehling's solution it gives a precipitate of -

1. CuO

2. Cu

3. $\mathrm{Cu}+{\mathrm{Cu}}_2\mathrm{O}+\mathrm{CuO}$

4. ${\mathrm{Cu}}_2\mathrm{O}$

Monomer of trioxane is

1. formaldehyde

2. acetone

3. isoprene

4. acetaldehyde

Which will not give formaldehyde on heating or up distillation?

1. paraldehyde

2. trioxane

3. formalin

4. paraformalehyde 

Given the following reaction:
CH₃CHO+HCN→X
(Assume compound X has a chiral centre)
The optical activity associated with product X would be: 

1. Laevorotatory 
2. Dextrorotatory
3. Mesocompound
4. Racemic mixture

Benzophenone can be converted into benzene using 

1. anhydrous ${\mathrm{AlCl}}_3$

2. acidified dichromate

3. sodium amalgam in water

4. fused alkali

Which of the following react with NaOH to produce an acid and alcohol?

1. ${\mathrm{CH}}_3\mathrm{COOH}$

2. HCHO

3. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COOH}$

4. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}$