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Question 20.
In an attempt to demonstrate electrical conductivity through an electrolyte, the following apparatus ( see the figure ) was set up.

Which among the following statement(s) is/ are correct?
(i) Bulb will not glow because electrolyte is not acidic.
(ii) Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
(iii) Bulb will not glow because circuit is incomplete.
(iv) Bulb will not glow because it depends upon the type of electrolytic solution.

(a) (i) and (iii)
(b) (ii) and (iv)
(c) (ii) only
(d) (iv) only


Solution

Bulb will glow because NaOH being a strong base furnishes OH and Na+ ions (which are responsible for electrical conductivity). Hence, option (c) is the correct answer.

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