Formaldehyde can be distinguished from acetaldehyde by:

1. Fehling's solution

2. Schiff's reagent

3. Ammonia

4. Ammoniacal ${\mathrm{AgNO}}_3$

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

Amongst the following carboxylic acids the strongest acid is:

1. benzoic acid

2. 0-methoxybenzoic acid

3. m-nitrobenzoic acid

4. p-nitrobenzoic acid

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)

Cyanohydrin of which compound gives lactic acid on hydrolysis?

1. Acetone                                 

2. Acetaldehyde

3. Propanal                                 

4. HCHO

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

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

Benzene sulphonic acid on treating with P₂O₅ gives:

1. salicylic acid 

2. benzoic acid

3. acid anhydride

4. sodium benzoate

Oxalic acid on treatment with conc. H₂SO₄ gives:

1. CO + H₂O₂                           

2.  H₂O +CO+CO₂

3. HCOOH + CO₂                       

4.  HCOOH + CO₂ +O₂

Aldehydes and ketones will not form crystalline derivatives with                   

1. sodium bisulphite

2. phenyl hydrazine

3. semicarbazide hydrochloride

4. dihydrogen sodium phosphate