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NEET Sample Paper NEET Sample Test Paper-47

  • question_answer
    Which of the following pairs of substances on reaction will not evolve H gas?

    A) Fe and \[{{\operatorname{H}}_{2}}S{{O}_{4}}\](aqueous)

    B) Copper and HC1 (aquecous)

    C) Sodium and ethyl alcohol

    D) Iron and steam

    Correct Answer: B

    Solution :

    Copper and HC1 (aq) \[\operatorname{Cu} + HC1 \left( aq. \right) \to  No reaction\] Copper has higher reduction potential.


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