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

Correct the following statement:

A molecular formula represents an element.

Correct the following statement:

Molecular formula of water is H₂O₂

Correct the following statement:

Formula of iron (lll) oxide is FeO.

Give the empirical formula of : Benzene C₆H₆

Give the empirical formula of Glucose C₆H₁₂O₆ .

Give the empirical formula of Acetylene C₂H₂

Give the empirical formula of Acitic Acid CH₃COOH.

Give an example of the following chemical changes.

A photochemical reaction involving silver salt.

Give an example of the following chemical changes.

A reaction involving blue solution.

Complete the following statement.

On heating, hydrated copper sulphate changes its colour from ________ to __________.

Why energy is involved in a chemical change?

Name a carbonate which do not decompose on heating.

Name a nitrate which produces oxygen as the only gas.

Name a compound which produces carbon dioxide on heating.

What do you observe? When

Lead nitrate is heated.

Give an example of the following chemical changes.

An exothermic and an endothermic reaction involving carbon as one of the reactants.

Define exothermic and endothermic changes. Give two example in each case.

State Dalton's atomic theory.

On the basis of Rutherford's model of an atom, which subatomic particle is present in the nucleus of an atom?