Anshu Suri Gulati Solutions for Chapter: Study of First Element - Hydrogen, Exercise 1: PRACTICE QUESTIONS

A black metallic oxide 'A' on reaction with colourless and odourless gas 'B' forms pinkish red metal 'C' and colourless liquid 'D'.

(i) Identify A, B, C and D.

(ii) Give a balanced chemical equation for the reaction.

(iii) What is the purpose of gas 'B'?

(iv) Give two tests for colourless liquid 'D'.

Complete and balance the equation.

$\mathrm{Mg}+{\mathrm{H}}_2\mathrm{O}\to$

Complete and balance the equation.

$\mathrm{Zn}+\mathrm{HCl}\to$

Complete and balance the equation.

$\mathrm{Fe}+\mathrm{HCl} \to$

Complete and balance the equation.

$\mathrm{K}+{\mathrm{H}}_2\mathrm{O} \to$

Complete and balance the equation.

$\mathrm{Fe}+{\mathrm{H}}_2\mathrm{O}\to$

Nitric acid is avoided in the preparation of hydrogen. Give reason.

Only granulated zinc is used for the preparation of hydrogen. Give reason.