Assertion: A small amount of acid or alkali is added before electrolysis of water.
Reason: Pure water is weak electrolyte.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
(e) If the Assertion is incorrect but the Reason is correct.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
Explanation:
Water is a covalent compound, hence pure water is a weak electrolyte and feebly ionised and thus bad conductor of electricity. However, addition of a small amount of acid or alkali increases ionisation of water making at good conductor of electricity.