Aldehydes and ketones will not form crystalline derivatives with                   

1. sodium bisulphite

2. phenyl hydrazine

3. semicarbazide hydrochloride

4. dihydrogen sodium phosphate

Oxalic acid on treatment with conc. H₂SO₄ gives:

1. CO + H₂O₂                           

2.  H₂O +CO+CO₂

3. HCOOH + CO₂                       

4.  HCOOH + CO₂ +O₂

Benzene sulphonic acid on treating with P₂O₅ gives:

1. salicylic acid 

2. benzoic acid

3. acid anhydride

4. sodium benzoate

The IUPAC name of crotonaldehyde is:

1. But-2-en-1-al

2. Prop-2-enal

3. 4-Methylpent-3-en-2-one

4. None of the above

The IUPAC name of tartaric acid is:

1. 2,3-dihydroxy butane-1, 4-dioic acid

2. 1,4-dihydroxy butane-2-3-dioic acid

3. butane-1 4-dicarboxylic acid

4. none of the above

Cyanohydrin of which compound gives lactic acid on hydrolysis?

1. Acetone                                 

2. Acetaldehyde

3. Propanal                                 

4. HCHO

Which of the following is the strongest acid?

1. HCOOH (pK_a 3.77)

2. C₆H₅COOH (pK_a 4.22)

3. CH₃COOH (pK_a 4.71)

4. CH₃CH₂COOH (pK_a 4.88)

Which of the following would produce secondary alcohol?

1. C₆H₅COCH₃$\underset{2. {\mathrm{H}}^{+}}{\overset{1. {\mathrm{CH}}_3\mathrm{MgBr}}{\to }}$

2. C₆H₅COCH₃$\underset{2. {\mathrm{H}}^{+}}{\overset{1. {\mathrm{LiAlH}}_4}{\to }}$

3. C₆H₅CHO$\underset{2. {\mathrm{H}}^{+}}{\overset{1. {\mathrm{LiAlH}}_4}{\to }}$

4. C₆H₅COOMe$\underset{2. {\mathrm{H}}^{+}}{\overset{1. {\mathrm{LiAlH}}_4}{\to }}$

Product P in the above reaction is -

1. 

2. 

3. 

4. 

Amongst the following carboxylic acids the strongest acid is:

1. benzoic acid

2. 0-methoxybenzoic acid

3. m-nitrobenzoic acid

4. p-nitrobenzoic acid