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Which solutions make the bulb glow (glucose, alcohol, HCl, H2SO4)

The same question, asked 3 times: 2023*, 2024*, 2026. Every wording below, oldest first.

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  1. Question 1

    2023

    2
    In the given experimental set-up, if the experiment is carried out separately with each of the following solutions the cases in which the bulb will glow is/are : (i) Dilute hydrochloric acid (ii) Dilute sulphuric acid (iii) Glucose solution (iv) Alcohol

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  2. Question 2

    2024

    3
    Four solutions, namely glucose, alcohol, hydrochloric acid and sulphuric acid filled in four separate beakers are connected one by one in an electric circuit with a bulb. The solutions in which the bulb will glow when current is passed are :

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  3. Question 3

    2026

    22
    Four solutions, namely fructose, ethanol, hydrochloric acid and sodium hydroxide filled in four separate beakers are connected one by one in an electric circuit with a bulb. The solutions in which the bulb will glow when current is passed are :

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