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An aqueous sugar solution does not make a bulb glow, while an acidic solution does. What is the correct reason?

Answer and explanation

Correct answer: Mobile ions are not formed in sugar solution

An aqueous solution conducts electricity when it contains sufficient mobile ions. Sugar dissolves as neutral molecules and does not appreciably ionise, so the solution has very few charge carriers and does not light the bulb in the simple test. An acid ionises in water and supplies mobile H+ and corresponding negative ions, allowing current to pass. Thus option A is correct; B, C, and D conflict with these observations.

Related tags

Sugar-SolutionAcid-SolutionIonsConductivityClass10AcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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