Question

Q. 2. Read the following statements and correct the wrong ones :
(1) Air is available in plenty.
Ans.
(2) We obtain salt from river water.
Ans.
(3) Natural resources are to be used in a judicious manner.
Ans.
me the following:​

Answer 1

Answer:

2 nd is wrong statement because we ontain salt from sea water not by the river

Answer 2

Answer:

Statement (2) is incorrect.

Explanation:

• Statement (1) says the air is available in plenty.

• Yes, this statement is correct since air is present in the atmosphere in more than the required quantity. Thus it is plentily available.

Statement (3) says that natural resources are to be used judiciously.

• The unnecessary and indiscriminate use of natural resources such as coal, petrol etc, causes their depletion with environmental pollution. Since they are limited, they can't be replaced. So their proper management and judicious use can keep them intact in future.

Statement (2) is incorrect.

• It is because we obtain salt from saltwater i.e. from the ocean and seawater.
• As we know, the majority of Earth's total surface is occupied by 71% of water, of which 97% is saltwater and only 3% is the freshwater source.

• Salt ($NaCl$ -formed by the interaction of $Na^{+}$ and $Cl^{-}$ in water ) is dissolved in large quantities and serves as the major constituent of sea and ocean water. This salt is obtained by the evaporation process.

Hence Statement (2) can be correctly written as-

We obtain salt from sea and ocean water.