ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

Tick (√) the correct alternative from the choice given for the following statement.

An example of both physical and chemical change is

Tick (√) the correct alternative from the choice given for the following statement.

The compound rust is a hydrated oxide of

Tick (√) the correct alternative from the choice given for the following statement

A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.

True or false 

Is melting of ice a reversible change?

True or false 

Change of seasons is a non-periodic change. 

True or false 

In a physical change no net energy change is involved.

True or false 

Dissolving of a solid in liquid is a physical change. 

True or false 

Is the process of digestion a physical change?

Tick the most appropriate answer.

Rising and setting of the sun at a given place is a

 Tick the most appropriate answer.

Physical changes are

Tick the most appropriate answer.

Photosynthesis requires

 Fill in the blank

Changes that occur in nature are called ______

Fill in the blank

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

Match the columns.

Write true or false

Burning of paper and formation of curd are reversible changes.

Write true or false

A natural change can also be a desirable change.

Write true or false

Deforestation is a man-made change.

Write true or false 

Decomposition of leaves is a fast change.

Write true or false 

Dissolving of solute in a solvent and rusting of iron are both physical changes.

Photosynthesis cannot take place at night.