When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphide is obtained and the sulphuric acid so formed remains in the solution. The reaction is an example of a

Pb + CuCl2 → PbCl2 + Cu

HgO(s)Heat−−→Hg(l)+O2(g)

ZnCO3 → ZnO + CO2

CaO(s)+SiO2(s)→CaSiO3(s)

Fe2O3 + 2Al → Al2O3 + 2Fe

Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine. Identify the type of reaction:

Write one equation for decomposition reactions where energy is supplied in the form of either heat,electricity and light.(only one)

Zinc reacts with silver nitrate to produce zinc nitrate and silver.Write the balanced equation. Also identify the reaction type.

3H2 +N2 → 2NH3

TiCl4(l)+Mg(s)→Ti(s)+MgCl2(s)

H2O2(l)UV−−→H2O(l)+O2(g)

Mg(s)+Cl2(g)→MgCl2(s)