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    When a zinc metal piece is placed in hydrochloric acid, ______________ gas is evolved.
    Question

    When a zinc metal piece is placed in hydrochloric acid, ______________ gas is evolved.

    A.

    Carbon dioxide

    B.

    Nitrogen

    C.

    Hydrogen

    D.

    Oxygen

    Correct option is C

    The correct answer is (c) Hydrogen.
    · When a piece of zinc metal is placed in hydrochloric acid, hydrogen gas is evolved. The reaction between zinc and hydrochloric acid produces zinc chloride and hydrogen gas.
    Chemical Reaction:
    Zn+2HCl→ZnCl2+H2↑
    Information Booster:
    · Carbon Dioxide : Produced when acids react with carbonates or bicarbonates.
    · Nitrogen and Oxygen : Not typically evolved in this type of reaction.

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