Question

Compound A reacts with to give B which on treatment with KCN followed by hydrolysis gave propionic acid. What is A and B respectively

• A. and
• B. $\mathrm { C } _ { 2 } \mathrm { H } _ { 6 }$ and $\mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl }$
• C. $\mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl }$and$\mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl }$
• D. $\mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl }$

Answer 1

Answer: (D)

$\mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl }$

Answer 2

$\underset { \text { (A) } } { \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { OH } + \mathrm { PCl } _ { 5 } } \rightarrow \underset { \text { (B) } } { \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl } + \mathrm { POCl } _ { 3 } } + \mathrm { HCl }$

$\mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { Cl } + \mathrm { KCN } \rightarrow \mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { CN } + \mathrm { KCl }$ (B)