ICSE ICSE Class 7 - CISCE Question Bank Solutions for Chemistry

Write whether the following statement are true or false.

A gas has no free surface.

Give reasons 

Gold is mixed with copper and nickel.  

Write true or false for each statement. Rewrite the false statement correctly.

 Solids and liquids can flow.

Write true or false for each statement. Rewrite the false statement correctly.

Solids can be compressed easily.

Write true or false for each statement. Rewrite the false statement correctly.

The smallest part of an element capable of independent existence is called an atom.

Write true or false for each statement. Rewrite the false statement correctly.

The intermolecular space in a gas is almost negligible.

For the following statements, say whether it describes a solid, a liquid or a gas.
Particles move about very quickly.

For the following statements, say whether it describes a solid, a liquid or a gas.

Particles are quite close together

For the following statements, say whether it describes a solid, a liquid or a gas.

Particles are far apart and move in all directions 

Give two uses of Germanium  

Fill in the blank 

_______ is a soft metal. 

Name the phenomenon which causes the Formation of water vapour from water is 

Fill in the blank 

A metal that gives dazzling effect to crackers when they explode is ______

Name the phenomenon which causes the Disappearance of camphor is

Name the phenomenon which causes the Conversion of ice into water is

Name the phenomenon which causes the Conversion of water into steam is 

Give two examples for the following :

Substances which sublime.

Give two examples for the following :

Substances which do not change their states.

Give two examples for the following :

Substances that are rigid and not compressible.

Write ‘true’ or ‘false’ for the following statement : 

Silver is used to make electric cables.