Question

Which of the following is not a property of water?
(a) It becomes denser when it freezes.
(b) It dissolves molecules in the air.
(c) It absorbs heat when the hydrogen bonds break
(d) It forms hydrogen bonds with other water molecules to create surface tension.
(e) It forms hydrogen bonds with other molecules by adhesion.

Answer 1

Hint: Water is a transparent chemical substance, which is inorganic and doesn't have any taste or odor and constitutes a major part of Earth's hydrosphere and the liquid part of living organisms. Even though water doesn't provide any calories or nutrients, It is important for all kinds of forms of life forms on earth.

Complete step by step answer:
The statement that water becomes denser when it freezes is not a property of water.
- Water gets converted to ice when it freezes which provides a cage- like structure due to which the density decreases than water. Therefore, water is denser in liquid form than when it freezes and becomes a solid form.
- Many gases are soluble in water since water is a polar solvent and therefore water dissolves molecules in the air.
- Water has high specific heat capacity, due to which, when the high energy hydrogen bonds break and releases heat, it will be absorbed by water.
- Formation of hydrogen bonds between water molecules is due to surface tension interaction between the water molecules.
- Force of attraction among various molecules is known as adhesion. Water has the ability to hydrogen bonds with other molecules.
So, the correct answer is, ‘It becomes denser when it freezes’.

Note:
- 71 percent of the Earth's surface is covered mostly by marine water and rests in different forms such as ice, groundwater, etc.
- Water also plays a key feature in the food and economy sectors, as 70 per cent of total freshwater is used by humans for agricultural purposes.
- For both mineral and organic substances, water is a good solvent, which makes it suitable for cooking and washing.