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प्रश्न
In the circuit below, the lamp lights up.
What could X be?
पर्याय
a solution of alcohol in water
a solution of sodium chloride in water
Sugar solution
solid potassium chloride
MCQ
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उत्तर
A solution of sodium chloride in water
Explanation:
For the lamp to light up, substance X must be an electrolyte that contains free mobile ions to conduct electricity. A solution of sodium chloride splits into free-moving Na+ and Cl− ions in water, which completes the circuit and allows current to flow.
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