Question

Assertion: When pH of rain water is less than 7 it is called acid rain
Reason: When electricity is passed through a aqueous solution of sodium chloride it
decomposes to form sodium carbonate.
(a) Both (A) & (R) are true, (R) is correct explanation of the Assertion.
(b) Both (A) & (R) are true, (R) is not the correct explanation of the Assertion.
(C) (A) is true but (R) is false.
(d) (A) is false but (R) is true​

Answer 1

Explanation:

Assertion is true but Reason is false .

NaCl decomposes to form H2 , Cl2 , NaOH .

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Answer 2

(C) (A) is true but (R) is false.

• When pH of rain water is less than 7 it is called acid rain. Generally, when oxides like SO2 and CO2 combines with rainwater it results in formation of acid rain. These are non-metal oxides hence, are acidic in nature. Therefore, the given assertion is true.
• There's no decomposition of sodium chloride to form sodium carbonate instead when the electric current is passed, chlorine gas forms at positive electrode and hydrogen gas at negative. Hence, the given reason is false.