The correct order of acid character of the following compounds is: 

(I)	(II)	(III)	(IV)

The major product of the following chemical reaction is :

   \( \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CN} \xrightarrow[\text { (3) } \mathrm{Pd} / \mathrm{BaSO}_4, \mathrm{H}_2]{\text { (1) } \mathrm{H}_3 \mathrm{O}^{+},\Delta ~~(2) \mathrm{SOCl}_2} ?\)$$

The correct IUPAC name of the following compound is :

Compound(s) which will liberate carbon dioxide with sodium bicarbonate solution is/are:

(A)	(B)	(C)

1. B only

2. C only

3. B and C only

4. A and B only

Consider the following chemical reaction,

 $\mathrm{CH}\equiv \mathrm{CH}\underset{\left(2\right)<mspace\; width="1em"></mspace>\mathrm{CO},<mspace\; width="1em"></mspace>\mathrm{HCl},<mspace\; width="1em"></mspace>{\mathrm{AlCl}}_3}{\overset{(1)\mathrm{RedhotFetube},\hspace{0.17em}873\mathrm{K}}{\to }}<mspace\; width="1em"></mspace>\mathrm{Product}$

The number of sp² hybridized carbon atom(s) present in the product is:

1. 6

2. 7

3. 8

4. 5

What is 'X' in the given reaction?



1. 
2. 
3. 
4.