Hydrogen Chloride — Chemistry STD 10 — Question

Assertion (A): If the temperature of a gas is tripled, while keeping the volume constant, the pressure of the gas will also triple.
Reason (R): According to Gay Lussac's Law, the pressure of a gas is directly proportional to its absolute temperature when the volume is constant.

Which salt solution will form a deep blue coloration when treated with excess of NH₄OH solution?

A compound which liberates reddish brown gas around the anode during the electrolysis in its molten state is:______________

The metallic character __________ in a group as one moves from top to bottom.

An oxide which dissolves in water forming an acid.

A compound has following % age composition by mass:
carbon 14.4%; hydrogen 1.2% and chlorine 84.5%. If atomic masses of C = 12, H = 1 and Cl = 35.5, then empirical formula of compound is:

Identify the pairs of metals and their ores from the following.

Group A	Group B
(a) Bauxite	(i) Iron
(b) Calamine	(ii) Aluminium
(c) Magnetite	(iii) Zinc

Which of the following metal will not react with dilute sulphuric acid?

Sodium and sodium ions :

Ammonium phosphate and ammonium sulphate are made from ammonia. These compounds have greater usage in fertilisers industry. The solution of ammonia is alkaline in nature.
Which of the following could be used to show that the ammonia solution is alkaline in nature?