1 |
Speed of sound is maximum in |
A metal wire
Air
Water
Vacuum
|
2 |
Which object reflect maximum light. |
White paper
Coloured paper
Mirror
Brick wall
|
3 |
How does light travel in air. |
In a circle
Along curved path
Along a straight line
In dispersed path
|
4 |
When a substances is changed in which new thing a obtained. |
Physical change
Chemical change
Decaying
Rusting
|
5 |
When a substances in changed in state of atter without making a new thing is called. |
Physical change
Chemical change
Rusting
Decaying
|
6 |
The change that occured on the irion due toaction of oxygen and water is called. |
Burning
Decaying
Rusting
Melting
|
7 |
The flame develope during combustion reaction is called. |
Decaying
Burning
Rusting
Melting
|
8 |
They obtain their food by decomposing the dead bodies into simple components. This process is called. |
Burning
Decaying
Rusting
Melting
|
9 |
The substance that dissolves in water in less quantity is called |
Solvent
Solute
Mixture
Concentrated
|
10 |
The change of gas into liquid is called |
Pressure
Condensation
Force
Melting
|