7th Class Science Sample Paper Science Olympiad Model Test Paper-18

  • question_answer
    Which one of the following is an example of double displacement reaction?

    A) \[{{N}_{2}}+3{{H}_{2}}\to 2N{{H}_{3}}\]

    B) \[Mg(s)+2HCl(aq)\to MgC{{l}_{2}}(aq)+{{H}_{2}}(g)\]

    C) \[NaCl+AgN{{O}_{3}}\to AgCl+NaN{{O}_{3}}\]

    D) Both a and b

    E) None of these

    Correct Answer: C


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