Give the equation for the lab preparation of hydrogen.

(i) Write the equation for the laboratory preparation of hydrogen. (ii) How is the gas collected? (iii) Write the confirmatory test for Hydrogen.

Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.

Answer the question pertaining to laboratory preparation of Hydrogen chloride: Write an equation for the laboratory preparation of Hydrogen chloride.

Write the equation for the lab preparation of HNO_(3) from potassium nitrate and conc . H_(2)SO_(4) .

Give chemical equation for the preparation of ethyne from 1,2-dibromethane.

Write the equations for the lab , preparation of [i] Na_(2)SO_(4) using dil , H_(2)SO_(4) . [ii] PbSO_(4) using dil H_(2)SO_(4) .

What are copolymers ? Give the chemical equation for the preparation of terylene.

What are elastomers ? Give the chemical equation for the preparation of Buna-S.

Give the equations of reaction for the preparation of phenol form cumene.

Give balanced equations for the preparation of the following salts: PbCl_2 from PbO