Physics
The average kinetic energy of the molecules of an ideal gas is directly proportional to

Mass of Molecules
Temperature of environment
Absolute temperature of the gas
Velocity of Molecules

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Physics
Purpose of an optical filter is to

Dispense light into component colours
Transmit or absorb light of different colours
Refract light of different colours
Reflect lights of different colours

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Physics
Mirage is due to:

Equal heating of different parts of the atmosphere
Unequal heating of different parts of the atmosphere
Magnetic disturbances in the atmosphere
Depletion of ozone layer in the atmosphere

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Physics
A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

None of these
It will fall down at the same place where the string breaks
The ball will travel towards the center of the circle and fall down
It will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

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