(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Chemistry

What is meant by the term ‘symbol’?

Name three metals whose symbols are derived from the first letter of the name of the element.

What is meant by the term subatomic particles?

Name three metals whose symbols are derived: from their Latin names.

Give the qualitative and quantitative meaning of the term ‘symbol’.

Differentiate between the following:

Solute and solvent – forming a solution.

State why hydrogen is not prepared in the laboratory by the action of calcium with dilute sulphuric acid.

State why hydrogen is not prepared in the laboratory by the action of lead with dilute hydrochloric acid.

What is meant by ‘period number’. What does it signify?

‘Magnesium reacts with very dilute nitric acid at low temperatures liberating hydrogen.’ Give reasons.

Give a reason for the following:

Properties of elements are periodic functions of their atomic numbers and not atomic weights.

Name the following.

A metal below iron but above copper in the activity series of metals which has no reaction with water.

Name the following.

A metal which cannot be used for the preparation of hydrogen using dilute acids.

Name the following.

The salt formed when aluminium reacts with potassium hydroxide, during the preparation of hydrogen from alkalis.

State why the molecular formula of zinc carbonate is ZnCO₃ .

What does the symbol '→' present in a chemical equation, mean?

What does the symbol '⇌' present in a chemical equation, mean?

What does the symbol '(s)' present in a chemical equation, mean?

What does the symbol '(l)' present in a chemical equation, mean?

What does the symbol '(aq.)' present in a chemical equation, mean?