(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Chemistry

Identify the gas evolved and give the chemical test in the following case:

Dilute hydrochloric acid reacts with iron (II) sulphide.

Identify the salts P and Q from the observation given below:
On performing the flame test salt P produces a lilac coloured flame and its solution gives a white precipitate with silver nitrate solution. Which is soluble in ammonium hydroxide solution.

Answer the following question related to salts and their preparations:

What kind of salt is prepared by precipitation?

Explain the following method with example. 

Displacement

Give a balanced equation for preparation of a non-volatile acid from a volatile acid.

State the term defined by the following sentence:

The insoluble solid formed when two solutions are mixed together.

Write the balanced equation for the preparation of the following compound (as major product) starting from iron and using only one other substance:

Iron (II) chloride

Write the balanced equation for the preparation of the following compound (as major product) starting from iron and using only one other substance:

Iron (II) sulphate

The preparation of Lead sulphate from Lead carbonate is a two-step process. (Lead sulphate cannot be prepared by adding dilute Sulphuric acid to Lead carbonate.)

What is the first step that is required to prepare Lead sulphate from Lead carbonate?

Why the alkali is added drop by drop to the salt solution?

1. Name the experiment illustrated below.
2. State the colour of the water that has entered the round-bottomed flask.

What property of hydrogen chloride is demonstrated when it is collected by downward delivery (Upward displacement)?

Explain with a diagram the preparation of aqueous ammonia.

Give two balanced reactions of the type to show the following property of sulphuric acid:

Dehydrating nature

Give a chemical test to distinguish between dilute sulphuric acid and dilute hydrochloric acid (using lead nitrate solution).

Name the acid formed when sulphur dioxide dissolves in water.

Name the gas released when sodium carbonate is added to a solution of sulphur dioxide.

Name the anion present in the following compound:

Compound D, when warmed with dilute sulphuric acid, gives a gas that turns acidified dichromate solution green.

Distinguish by a chemical test, sulphuric acid from nitric acid and hydrochloric acid.

State your observation when lead nitrate solution and sodium chloride solution are mixed.