Ncert Exercises & Solutions

Some of the properties of water are described below. Which of them is/are not correct?

a.	Water is known to be a universal solvent
b.	Hydrogen bonding is present to a large extent in liquid water
c.	There is no hydrogen bonding in the frozen state of water
d.	Frozen water is heavier than liquid water

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Hint: Intermolecular force of attraction is hydrogen bonding in water

There is H-bonding even in a frozen state of water, i.e., ice is lighter than liquid water.

The crystalline form of water is ice. At atmospheric pressure, ice crystallizes in the hexagonal form, but at very low temperatures it condenses to cubic form. The density of ice is less than that of water. Therefore, an ice cube floats on water.

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