MHT CET 2024 Chemistry question

Which of the following substances conducts electricity?

(1)Diamond
(2)sulphur (solid)
(3)Molten NaClCorrect
(4)Crystalline NaCl

Answer: (3)

Solution

A substance conducts electricity when it has mobile charge carriers (free electrons or mobile ions). Molten NaCl contains freely moving and ions, so it conducts by ionic conduction (and undergoes electrolysis). Hence (3). In crystalline NaCl (4)

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Question ID VK-095654