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

How will you prepare hydrochloric acid in laboratory?

Explain, why (or give reasons for)
Hydrochloric acid cannot be concentrated above 22.2% by boiling.

Explain, why (or give reasons for)
Only a very dilute solution of hydrogen chloride in water can be concentrated by boiling the solution while a very concentrated solution would become less concentrated when boiled.

Explain, why (or give reasons for)
A solution of HCl gas in water turns blue litmus red and conducts electricity, while HCI gas dissolves in toluene and it has no effect on litmus and does not conduct electricity.

Explain, why (or give reasons for)
An aqeous solution of chlorine is acidic is nature.

What would happen if :
Concentrated hydrochloric acid is kept open.

What would happen if
Hydrogen chloride prepared in laboratory, is passed through water, using a delivery tube.

Write three equations to show that hydrochloric acid acts as an acid.

Describe an experiment to prove the following:
HCI is highly soluble in water.

Give two tests for hydrochloric acid.

Write the uses of hydrochIoric acid.

How can you prove that hydrochloric acid contain :
Hydrogen

Fill in the blank:
Aqua-regia is a mixture of ___________ .

Fill in the blank:
A constant boiling mixture of water and hydrochloric acid is also called as _______________.

Fill in the blank:
___________ agent converts hydrochloric acid to chlorine.

Fill in the blank:
Hydrogen and chlorine reacts in presence of ___________ to form hydrogen chloride.

Fill in the blank:
The white precipitate of lead chloride is soluble in _________

Name the following
Gas obtained by treating chlorine in excess of ammonia.

Name the following

Solid obtained by passing ammonia over heated copper oxide

Name the following

Products obtained by burning ammonia in oxygen.