Question

Ferric sulphate on heating gives sulphur trioxide. The ratio between the weights of oxygen and sulphur
present in SO3 obtained by heating 1 kg of ferric sulphate is
1) 2:3
2) 1:3
3) 3:1
4) 3:2​

Answer 1

Ratio of oxygen and sulphur in SO3 is 3:1 Therefore, ratio of weights is 3×16:1×32=3:2

Answer 2

Explanation:

so your correct option is 4.

which is 3:2