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9th Class Science Structure of the Atom Question Bank Structure of the Atom

  • question_answer
    An element \[X\] combines with oxygen to form compounds \[P\] and\[Q\]. If the ratio of the valency of element \[X\] in \[P\] to element \[X\] in \[Q\] is \[3:5\] respectively, what could be the probable compounds \[P\] and\[Q\]?

    A)
    P Q
    \[CO\] \[C{{O}_{2}}\]

    B)
    P Q
    \[{{N}_{2}}{{O}_{3}}\] \[{{N}_{2}}{{O}_{5}}\]
     

    C)
    P Q
    \[{{H}_{2}}O\] \[{{H}_{2}}{{O}_{2}}\]

    D)
    P Q
    \[C{{H}_{4}}\] \[{{C}_{3}}{{H}_{8}}\]

    Correct Answer: B

    Solution :

     Let the ratio be multiplied by\[x\]. Valency of \[X\] in\[P=3x\] Valency of \[X\] in\[Q=5x\] \[P\to {{X}^{3x}}{{O}^{2}}\to {{X}_{2}}{{O}_{3x}}\] In the above options, \[{{N}_{2}}{{O}_{3}},\,\,{{N}_{2}}{{O}_{5}}\] are the probable compounds.


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