Identify the product (C) in the series of reactions

CH₃CN$\stackrel{\mathrm{Na}/{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\to }$A$\stackrel{{\mathrm{HNO}}_2}{\to }$B$\stackrel{{\mathrm{KMnO}}_4,{\mathrm{H}}^{+}}{\to }$C

1. CH₃COOH

2. CH₃CH₂NHOH

3. CH₃CONH₂

4. CH₃CHO

Product (B) of the reaction is :

Product (A) of the reaction is :

(A) and (B) is differentiated by :

(a) NaH

(b) 2-4 DNA

(c) Tollen's reagent 

(d) ${\mathrm{NaHSO}}_3$

Which $\mathrm{\beta }$-keto acid shown will not undergo decarboxylation ?

(a)              (b) 

(c)       (d) 

 $\underset{∆}{\overset{{\mathrm{H}}_3\mathrm{O}}{\to }}$ (A) , Product (A) obtained is-

1. 

2. 

3. 

4.

 +$\mathrm{R}-{\mathrm{CH}}_2-{\mathrm{NH}}_2$$\underset{\mathrm{THF}}{\overset{{\mathrm{K}}_2{\mathrm{CO}}_3}{\to }}$ (A) 

                                                      (71%)

In above reaction identify major product (A) of the reaction:

(a)     (b) 

(c)        (d) 

A key step in the hydrolysis of acetamide in aqueous acid proceeds by nucleophilic addition of-

1. ${\mathrm{H}}_3{\mathrm{O}}^{+}$ to                          

2.  ${\mathrm{H}}_2\mathrm{O}$ to   

3. ${\mathrm{H}}_3{\mathrm{O}}^{+}$ to                          

4. ${\mathrm{HO}}^{-}$ to 

Which is the major product of the following reaction ?

$\stackrel{{\mathrm{H}}_2\mathrm{S}}{\to }$product

1.         

3.      

4.      

5.