Question

Which of the following is true for water?

• A. Water has low heat capacity
• B. Used as a coolant in nuclear reactors
• C. Water reacts with sodium to produce hydrogen
• D. Pure water is acidic in nature

Answer 1

Answer: (B), (C)

The correct options are
B

Used as a coolant in nuclear reactors

C

Water reacts with sodium to produce hydrogen

Pure water is neither acidic nor basic. Hence, it is known as the neutral solvent.

Water has a high heat capacity (amount of heat required to raise the temperature of unit mass of a substance by one-degree centigrade) due to which it is a good cooling agent and is used as a coolant in a nuclear reactor. The temperature of the water does not increase sharply when it is heated.

Sodium reacts with water to produce hydrogen gas and sodium hydroxide. It is a highly exothermic reaction.

$Na\left(s\right)+H_{2}O\left(l\right)\to NaOH\left(aq\right)+H_2\left(g\right)$