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

It produces corrosion
Density of heavy water is higher than that of ordinary water
Freezing point 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
Stationary wave is formed by

A transverse wave superposing a longitudinal wave
Two waves of the same speed superposing
Two waves of same frequency travelling in the opposite direction
Two waves of same frequency travelling in the same direction

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