ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

Select the correct answer from A, B, C, D & E for the statement given below :

A non-metal that is lustrous.

Select the correct answer from A, B, C, D & E for the statement given below :

A mixture consisting of elements & a compound.

Select the correct answer from A, B, C, D & E for the statement given below :

A noble gas.

Match the separation of components in List I with the most appropriate process in List II.

The diagram represents fractional distillation for the separation of mixtures. Answer the following :

1. Can two immiscible liquids be separated by this process?
2. Separation of liquids by this process is based on which physical property?
3. If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
4. Give a reason for the above answer.
5. State the purpose of the fractionating column in the apparatus.

Select the correct answer from the choice given below to complete the sentence :

Dust in air is an example of _________ mixture.

Select the correct answer from the choice given below to complete the sentence :

Compounds are ____________ in nature.

Select the correct answer from the choice given below to complete the sentence :

An example of a monoatomic molecule is ___________.

Give a reason for the following statement :

The filter paper made into a cone & placed in a funnel for filtering out the solid particles in a solid-liquid mixture should be moistened before placing it.

Give a reason for the following statement :

Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.

 Tick the most appropriate answer

2. Melting of ice is a

1. reversible change
2. irreversible change
3. chemical change
4. none of these

Choose the most appropriate answer.
Rising and setting of the sun at a given place is a

Tick the most appropriate answer.

3. Physical changes are

1. permanent.
2. periodic,
3. temporary
4. irreversible.

Tick the most appropriate answer.

4. Chemical changes involve

1. change in shape.
2. change in size.
3. change in molecular composition.
4. none of these

 Tick the most appropriate answer.

5. Photosynthesis requires

1. heat energy.
2. wind energy
3. sunlight.
4. sound energy

Fill in the blank

change in which the substance can be brought back to its original state is called a ............... change.

 Fill in the blank.

Changes that occur in nature are called ........................

Fill in the blank.

An earthquake is a .................. change.

Fill in the blank.

A new substance is formed in a ............... change.

Fill in the blank.

Heat is .................... by a gas during the process of condensation.