Question

if dil H2SO4/HCL is added and evolving gas with the smell of burning sulphur,filter paper dipped in dichromate solution held at the mouth of the test tube of turns green confirm which radical​

Answer 1

Answer:

sulphite ions

Explanation:

reactions are -

(SO3)2- + 2HCL - H2SO3 + 2Cl-

H2SO3 - H2O+SO2(smell of burning sulphur)

2(Na2Cr2O7) + 6(SO2) - 6(Na2SO4) + 4Cr3+(green) + other pdt