Physics
Burns caused by steam are much severe than those caused by boiling water because

Temperature of steam is higher
Steam has latent heat
Steam pierces through the pores of body quickly
Steam is gas and engulfs the body quickly

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

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

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