$A$ compound $C$ (molecular formula, $C_{2} H_{4} O_{2}$ ) reacts with $N a$ metal to form a compound $R$ and evolves a gas which burns with a pop sound. Compound $C$ on treatment with an alcohol $A$ in presence of an acid forms a sweet smelling compound $S$ (molecular formula, $C_{3} H_{6} O_{2}$ ). On addition of $N a O H$ to $C$ , it also gives R and water. S on treatment with $N a O H$ solution gives back $R$ and $A$ .
Identify $R$ and $A$ ?

Compound

R

C H_{3} C O O N a

Compound

A

C H_{3} O H

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Compound

A

C H_{3} O H

Compound

R

C H_{3} C O O C H_{3}

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Compound

A

C H_{3} C O O H

Compound

R

C H_{3} C O O N a

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Compound

A

C H_{3} C O O N a

Compound

R

C H_{3} O H

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Solution

The correct option is A Compound $R$ is $C H_{3} C O O N a$
Compound $A$ is $C H_{3} O H$
Compound C is $C H_{3} C O O H$ .
Compound R is $C H_{3} C O O N a$ .
Compound A is $C H_{3} O H$ .
Compound S is $C H_{3} C O O C H_{3}$ .
Chemical reactions in sequence are as follows:
(a) $2 C H_{3} C O O H + 2 N a \to 2 C H_{3} C O O N a + H_{2}$
(C) (R)

(b) $C H_{3} C O O H + C H_{3} O H C o n c . H_{2} S O_{4} - ------- \to C H_{3} C O O C H_{3} + H_{2} O$
(C) (A) (S)

(c) $C H_{3} C O O O H + N a O H \to C H_{3} C O O N a + H_{2} O$
(C) (R)

(d) $C H_{3} C O O C H_{3} + N a O H \to C H_{3} C O O N a + C H_{3} O H$
(R) (A)

Option A is correct.

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A compounds C (molecular formula

C_{2} H_{4} O_{2}

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C_{3} H_{6} O_{2}

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to C, it also gives R and water. S on treatment with

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An organic compound A (molecular formula $C_{2} H_{4} O_{2})$ reacts with Na metal to form a compound B and evolves a gas which burns with a pop sound. Compound A on treatment with an alcohol C in the presence of a little of concentrated sulphuric acid forms a sweet-smelling compound D (molecular formula $C_{2} H_{6} O_{2})$ . Compound D on treatment with NaOH solution gives back B and C. Indentity A, B, C and D.