1. For the given reaction:

'P' is

(1).

(2).

(3).

(4).

2. The major product of the following reaction is

(1).

(2).

(3).

(4).

3. Identify the suitable reagent for the following conversion

(1).\(H_2/Pd-BaSO_4\)

(2). (i) \(LiAIH_4\), (ii) \(H^+ /H_2O\)

(3). (i) \(AIH\left(iBu\right)_2\), (ii) \(H_2O\)

(4). (i) \(NaBH_4\), (ii) \(H^+ / H_2O\)

4. The correct order of decreasing acidity of the following aliphatic acids is :

(1).HCOOH > (СН₃)₃ССООН > (СН₃)₂СНСООH > СН₃COOH

(2). (СН_з)₃ССООН > (СН₃)₂СHCOOH > СН₃СООН > НСООН

(3). СН₃СООН > (СН₃)₂СHСOOH > (СН₃)₃ССООН > HCOOH

(4). НСООН > СН₃СООН > (СН₃)₂СНСООH > (СН₃)₃ССООН