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NEET AIPMT SOLVED PAPER SCREENING 2012

  • question_answer
    Which one of the alkali metals, forms only, the normal oxide, \[{{\text{M}}_{\text{2}}}\text{O}\] on heating in air?

    A) Rb                          

    B) K                            

    C)        Li                            

    D)        Na

    Correct Answer: C

    Solution :

    Li is the alkali metal which forms only normal oxide \[L{{i}_{2}}O\] when heated in air. \[2Li+\frac{1}{2}{{O}_{2}}\xrightarrow[{}]{{}}L{{i}_{2}}O\] Sodium, when heated in air, forms peroxide while heavier alkali metals form superoxide as the major product.


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