Question

A sweet smelling organic compound ‘a' is slowly oxidized by air in presence of light to a highly poisonous gas. On warming with ag powder, it forms a gaseous substance ‘b' which is also produced by action of calcium carbide on water. Identify ‘a' & ‘b' and write the equations of the reactions involved.

Answer 1

Answer:

Organic compound A is Chloroform and B is Acetylene.

▪ Chemical equation of A

• 2CHCl3 +O2 will give 2COCl2 + 2HCl
• where 2COCl2 is phosgene which is highly poisonous unfit for use an an anaesthetic .

▪ Chemical equation of B

CHCl3 + 6Ag +CHCl3 on heating will give Ethyne(Acetylene) + 6AgCl.

• this reaction is called dehalogentation.