1] 30. 2075 GIE Q. No. 29 An organic compound gives H2 gas with
Sodium metal. On treatment with alkaline iodine gives yellow
ppt and on oxidation with CeO2/H+ form an aldehyde
(C2H4O). Name, the compound and write reactions involved.

Explanation:

Given -

To Find -

Now,

Let A be the organic compound.

Then,

Now,

Here we see that compound A reacts with chromic oxide (CrO₃) in the presence of acidic medium gives aldehyde.

And It forms only 2 Carbon aldehyde it means, It is Ethanal (CH₃CHO).

Compound A reacts with chromic oxide (CrO₃) in the presence of acidic medium gives ethanal.

It means,

We know that 1° alcohol on oxidation gives aldehyde.

Here it gives 2 Carbon aldehyde.

It means,

Here 2 Carbon and 1° alcohol is used.

Now,

Its cleared that Compound A is Ethanol.

Reaction Involved -

law of conservation of matter