Physics
At hill stations, the boiling point of water will be

More than that at sea level
Same as at sea level
Less than that at sea level
Equal to the melting point of ice

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Physics
It is easier for a man to swim in sea water, than in river water because

The density of sea water is lesser than the density of river water
The sea is-deeper than the river
The sea is wider than the river
The density of sea water is more than the density of river water

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Physics
The velocity of sound in air

Decreases with decrease of temperature
Decreases with increase of temperature
Increases with decrease of temperature
Does not depend on temperature

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