Acids

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  • Q1

    The products of the following chemical reaction are

    Marks:1
    Answer:

    KCl +H2O+ CO2

    Explanation:

    Acids give carbon dioxide gas, water and a salt on reaction with metal carbonates.

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  • Q2

    When an acid reacts with a metal sulphide, a gas having smell similar to rotten egg is liberated. This gas is

    Marks:1
    Answer:

    hydrogen sulphide.

    Explanation:

    Hydrogen sulphide (H2S) smells like rotten egg.

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  • Q3

    An example of strong, non-volatile acid is

    Marks:1
    Answer:

    H2SO4

    Explanation:

    A strong acid undergoes almost complete ionisation in an aqueous solution, thereby produces high concentration of H+ (aq) ions. A non-volatile acid has high boiling point. HCl is a strong acid but it is volatile as its boiling point is low.

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  • Q4

    Pick a monobasic acid from the following.

    Marks:1
    Answer:

    HCOOH

    Explanation:

    A monobasic acid is an acid whose one molecule on complete ionisation produces one hydronium ion.

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  • Q5

    A compound when dissolved in water produces hydronium ions as the only positively charged ions. The compound is a/an

    Marks:1
    Answer:

    acid.

    Explanation:

    An acid is a compound that on dissolving in water gives hydronium ions H3O+ as the only positively charged ions.

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