Chemical Bonding — Chemistry STD 10 — Question

State the property of the metal being utilized in the following :

Use of metal	Property
Zinc in Galvanization
Aluminium in Thermite welding

(a) Dilute nitric acid is generally considered a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals?
(b) Write the equation for the reaction of dilute nitric acid with copper.

How is methane prepared in the laboratory ?

Explain why is the basicity of acetic acid is one, and the acidity of magnesium hydroxide is 2.

(a) Which feature of ammonia molecule leads to the formation of the ammonium ion when ammonia dissolves in water?
(b) Name the other ion formed when ammonia dissolves in water.
(c) Give one test that can be used to detect the presence of the ion produced in (b).

Give reason for the following:
Carbon anodes are used in the electrolytic extraction of aluminium.

Write balanced equation for the reaction between dilute hydrochloric acid and sodium sulphite.

One chemical test that would enable you to distinguish between the following pair of chemicals. Describe what happens with each chemical or state no visible reaction.
Sodium sulphate solution and sodium chloride solution.

Aluminium is a more active metal than iron, but suffers less corrosion. Why?

A white solid A when heated with sodium hydroxide solution, gives a pungent gas B, which turns red litmus blue. The solid, when dissolved in dilute nitric acid and treated with silver nitrate gives a white precipitate of C which is soluble in an ammonia solution.