Added MnO2 and cone. H2SO4 to the salt Lead Chloride and heat it.
A greenish **** yellow **** gas with punget odour is evolved which turns moist starch iodide paper blue *****.
Now add dil. H2SO4 to Lead sulphide and heat
Colourless gas with rotten egg smell is evolved. The gas evolved turns moist lead acetate paper silvery *****.
