Q4.A white crystalline salt
(A) react with dilute HCl to liberate a suffocating gas (B) and also forms a
yellow precipitate . The gas (B) turns potassium dichromate acidified with dil
H2SO4 to a green coloured solution(C). A,B and C are
respectively
Q8.When a brown compound of Mn
(A) ids treated with HCl , it gives a gas (B) . The gas (B) taken in excess
reacts with NH3 to give an explosive compound (C). The compound A, B
and C are