The action of heat on the blue crystalline solid L gives a reddish bro

1.	The action of heat on the blue crystalline solid L gives a reddish brown gas M, a gas which relights a glowing splint and leaves a black residue. When as N, which has a rotten egg smell, is passed through a solution of L a black precipitate is formed.(i) Identify L, M and N (Name or formula).(ii) Write the equation for the action of heat on L.(iii) Write the equation for the reaction between the solution of L and the gas N.
Answer» (i) L is copper nitrate. M is nitrogen dioxide gas. N is hydrogen sulphide gas. (ii) 2Cu(NO₃)₂ → 2CuO + 4NO₂ + O₂ (iii) Cu(NO₃)₂ + H₂S → CuS + 2HNO₃

The action of heat on the blue crystalline solid L gives a reddish brown gas M, a gas which relights a glowing splint and leaves a black residue. When as N, which has a rotten egg smell, is passed through a solution of L a black precipitate is formed.(i) Identify L, M and N (Name or formula).(ii) Write the equation for the action of heat on L.(iii) Write the equation for the reaction between the solution of L and the gas N.

Answer»

(i) L is copper nitrate.

M is nitrogen dioxide gas.

N is hydrogen sulphide gas.

(ii) 2Cu(NO₃)₂ → 2CuO + 4NO₂ + O₂

(iii) Cu(NO₃)₂ + H₂S → CuS + 2HNO₃