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

Describe an experiment to prove the following:
HCI gas is heavier than air.

How can you prove that hydrochloric acid contain :
Chlorine?

Choose the correct answer from the options given below: HCl gas can be prepared by direct combination of hydrogen and chlorine gas in presence of

Name two gases which combine chemically to form a solid.

Write a balanced chemical equation for reaction of ammonia with heated copper oxide

How will you show that hychloric acid contains both hydrogen and chlorine (other than by electrolysis) ?

Hydrogen chloride gas is very soluble in water. It is dissolved in water to prepare hydrochloric acid by using an anti-suction device, as shown in the diagram. Very briefly explain how this device prevents the suction of water into the flask, in which hydrogen chloride gas is produced.

Give reason for the following:
Dilute hydrochloric acid cannot be concentrated by distilling (boiling) the dilute acid.

Dilute hydrochloric acid is added in turn to a mixture of iron and sulphur and to the compound formed between iron and sulphur. Name the gas formed in each case.

Hydrogen chloride dissolves in water to form an acidic solution.
Name the experiment which demonstrates that hydrogen chloride is very soluble in water.

(a) Name the experiment illustrate above.
(b) Which property of hydrogen chloride is demonstrated by this experiment?
(c) State the colour of the water that has entered the round-bottomed flask.

The diagram shows an apparatus for the laboratory preparation of hydrogen chloride.
(i) Identify A and B
(ii) Write the equation for the reaction
(iii) How would you check whether or not the gas jar is filled with hydrogen chloride?
(iv) What does the method of collection tell you about the density of hydrogen chloride.

Study the figure given below and answer that questions that follow:

(i) Identify the gas Y.
(ii) What property of gas Y does this experiment demonstrate?
(iii) Name another gas which has the same property and can be demonstrated through this experiment.

The following question is pertaining to the laboratory preparation of hydrogen chloride gas.

Write the equation for its preparation, mentioning the condition required.

The aim of the fountain experiment is to prove that

Define the following term : Hygroscopic substance

Define the following term : Dehydrating agent

Name the following:
Products obtained by treating zinc with dilute sulphuric acid.

Name the following:
Products obtained by treating ferrous sulphide with dilute sulphuric acid.

Name the following :
The precipitate obtained by treating aqueous lead nitrate with dilute sulphuric acid.