Question

A compound x on heating with excess con.H2so4 at 443 k gives an unsaturated compound y. X also react with na metal to evolve a colourless gas z .Identify x y and z. Write their eqution

Answer 1

On reading we can conclude that the substance 'X' is Ethanol (CH3-CH2OH) or Ethyl alcohol which on heating with excess conc. H2SO4(Sulphuric acid) gives an unsaturated compound 'Y' which is Ethene (CH2=CH2).'X'(Ethanol) also reacts with Na (sodium) to evolve a colorless gas 'Z'.The colorless 'Z'is Hydrogen (H2).

So, 'X'is Ethanol or Ethyl alcohol (CH2-CH2OH).

'Y' is Ethene (CH2=CH2).

'Z' is Hydrogen (H2).

The chemical reaction is ----:

Conc sulphuric acid 443k

CH3-CH 2OH -------------------------------------------

(Dehydration)

------->CH2=CH2+H2O

Reaction of X with sodium

2CH3-CH2OH +2Na-------->2C2H5O- Na+ +H2