ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

Draw a neat labelled diagram for the following experiment.

To prepare oxygen in the laboratory from hydrogen peroxide and a catalyst.

Draw a neat labelled diagram for the following experiment.

To demonstrate the burning of sulphur in a jar of oxygen.

State four differences between – elements, compounds and mixtures with suitable examples.

Select the correct answer to the statement given below:

The chemical name for dinitrogen oxide [N₂0].

Select the correct answer to the statement given below:

A compound containing carbon, oxygen and calcium.

Select the correct answer to the statement given below:

A metalloid

Select the correct answer to the statement given below:

A non-metal which exists in the liquid state.

Select the correct answer from the choice in the bracket.

The least reactive metal.

Select the correct answer from the choice in the bracket.

The positively charged particle of an atom.

Give a reason for the following statement:

Components in a mixture are present in varying proportions and not in a fixed proportion.

State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.

Draw the basic structure of an atom representing its –

1. Subatomic particles
2. Nucleus
3. Orbits or shells.

A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –

1. ammonium
2. bisulphate
3. carbonate

state the group of atoms present in each radical.

Select the correct answer to the statement given below:

The basic unit of matter is not capable of independent existence.

Select the correct answer to the statement given below:

The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.

Select the correct answer to the statement given below:

Imaginary path around the nucleus of an atom in which electrons revolve.

Complete the table by writing the symbols of the following elements

Write your observation and conclusion for the following:

When few marbles are put in a glass half-filled with water.

Write your observation and conclusion for the following:

Ice is kept at room temperature.

State three main characteristics of the particles of matter.