If 6 L of hydrogen and 4 L of chlorine are mixed and exploded and if water is added to the gases formed, find the volume of the residual gas.

Choose the role played by different solutions as A, B, C, which is responsible for the observation given in 1 to 3.

A. Solution X is a sodium hydroxide solution.

B. Solution Y is a weak acid.

C. Solution Z is dilute sulphuric acid.

(1) Liberate sulphur dioxide from sodium sulphite?

(2) Give a white precipitate with zinc sulphate solution?

(3) Contain solute molecules and ions?

X[2, 8, 8, 1] and Y[2, 8, 18, 7] are two elements. Using this information complete the following:

(a) …………… is the metallic element.

(b) Formula of the molecule of Y is ……………

(c) …………… is bad conductor of electricity.