Physics
Which of the following is not a property of heavy water ?

Freezing point of heavy water is higher than that of ordinary water
It produces corrosion
Density of heavy water is higher than that of ordinary water
Boiling point of heavy water is lower than that or ordinary water

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Physics
Rainbow is due to

diffusion of sunlight through water droplets
absorption of sunlight in minute water droplets
refraction and reflection of sunlight by water droplets
ionisation of water deposits

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Physics
Kinetic energy depends on

Both mass and velocity of the moving body
The mass of the moving body
The pressure of the moving body
The velocity or speed of the moving body.

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