Among the following acids which has the lowest pK_a value?
1. CH₃CH₂COOH
2. (CH₃)₂ CH—COOH
3. HCOOH
4. CH₃COOH

p-cresol reacts with chloroform in an alkaline medium to give the compound A which adds hydrogen cyanide to form, compound B. The latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid is-

1. 

2. 

3. 

4. 

The correct order of increasing acid strength of the compounds : 

I. CH₃CO₂H 

II. MeOCH₂CO₂H 

III. CF₃CO₂H 

IV. 

1. II < IV < I < III 

2. IV < I <III <II 

3. IV < I < II < III 

4. I < IV < III < II 

The increasing order of the rate of HCN addition to compounds A-D is : 

A. HCHO 

B. CH₃COCH₃

C. PhCOCH₃

D. PhCOPh

1.  A < B < C < D

2. D < B < C < A 

3. D < C <B < A 

4. C < D < B < A

The end product (A) of the following reaction is-

1.		2.
3.		4.

On vigorous oxidation by potassium permanganate solution, (CH₃)₂ C = CHCH₂CHO gives:

1.	(CH3)2CO and OHCCH2CHO
2.
3.	(CH3)2CO and  OHCH2CHO
4.	(CH3)2CO and CH2(COOH)2

The compound formed as a result of oxidation of propyl benzene by KMnO₄ is –
1. benzophenone
2. acetophenone
3. benzoic acid
4. benzyl alcohol

In the following sequence of reactions,

Toluene \(\xrightarrow[]{KMnO_{4}}\)  A  \(\xrightarrow[]{SOCl_{2}}\) B \(\xrightarrow[BaSO_{4}]{H_{2}/Pd}\) C

The product C is:

In the given reaction, 



the product C is -

1. Acetylene

2. Acetamide 

3. Ethanamine

4. Ethanol 

In the given transformation, which of the following is the most appropriate reagent ?

1. Zn – Hg/HCl

2. Na, Liq. NH₃

3. NaBH₄

4. ${\mathrm{NH}}_2{\mathrm{NH}}_2,\stackrel{\ominus }{\mathrm{O}H}$