KBr, on reaction with conc. `H_(2)SO_(4)`, gives reddish-brown gas :

KBr ,on reaction with conc H_(2)SO_(4) give reddish brown gas which bleaches moist limus paper .The evolved gas is

Anisole with conc. H_(2)SO_(4) gives.

The reaction of HCOOH with conc. H_(2)SO_(4) gives

When KBr is treated with conc. H_(2)SO_(4) reddish-brown gas is evolved. The gas is

The reaction of HCOOH with conc. H_2SO_4 gives