How many of the following compound have less $\mathrm{pKa}$ than benzoic acid:

$\left(\mathrm{i}\right) \mathrm{HCOOH}$ $\left(\mathrm{ii}\right) {\mathrm{CH}}_3\mathrm{COOH}$

 $\left(\mathrm{iii}\right)$  $\left(\mathrm{iv}\right)$  $\left(\mathrm{v}\right)$  $\left(\mathrm{vi}\right)$  $\left(\mathrm{vii}\right)$  $\left(\mathrm{viii}\right)$ 

Give the decreasing order of nucleophilic addition reaction of the following :-

 $\left(\mathrm{i}\right) \mathrm{HCHO}$

 $\left(\mathrm{ii}\right) \mathrm{PhCHO}$

 $\left(\mathrm{iii}\right) {\mathrm{CH}}_3-\mathrm{CHO}$

$\left(\mathrm{iv}\right)$ Acetophenone

The number of products formed in the following reaction(s) is/are

The products obtained in the above reaction is-

Reagent "$\mathrm{P}$" in the given reaction is:

Number of reactions which give alcohol as product.

(a) _ _ _ _ _ 

(b) _ _ _ _ _ 

(c)  _ _ _ _ _ 

(d)_ _ _ _ _ 

(e) _ _ _ _ _ 

How many of following reactions are hydrolysis reactions?

(1) ${\mathrm{CH}}_3-\mathrm{COOH}+{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\stackrel{{\mathrm{H}}^{+}}{⟶}$

(2) 

(3) 

(4) ${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{N}\stackrel{\mathrm{H}{}_3\mathrm{O}^{+}}{\to }$

(5) 

(6) ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{NH}\stackrel{{\mathrm{H}}_3{\mathrm{O}}^{+}}{⟶}$

(7) ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{O}-{\mathrm{C}}_2{\mathrm{H}}_5\stackrel{{\mathrm{H}}_3{\mathrm{O}}^{+}}{⟶}$

(8) 

How many of the following may produce salicylic acid on hydrolysis under appropriate conditions?

(i) 

(ii) 

(iii) 

(iv) 

(v)