Question

An organic compound A on heating with concentrated H2S o4 give product B and on warming with alkaline KMnO4 give compound C. Compound A on heating with compound C in presence of concentrated H2s o4 formed compound D, which has fruity smell.
identify the compound A,B,C and D
​

Answer 1

Since compound C gives 2 moles of CO

2

and 3 moles of H

2

O, it shows that it has the molecular formula C

2

H

6

(Ethane). C is obtained by the addition of one mole of hydrogen to compound B so the molecular formula of B should be C

2

H

4

(Ethene). Compound B is obtained by heating compound A with concentrated H

2

SO

4

which shows it to be an alcohol. So compound A could be C

2

H

5

OH.

(Ethanol)

C

2

H

5

OH

Hot conc. H

2

SO

4

C

2

H

4

+H

2

O

A B

C

2

H

4

+H

2

Ni

C

2

H

6

B C

2C

2

H

6

+7O

2

→4CO

2

+6H

2

O+ Heat and light

C