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JEE Main & Advanced Chemistry States of Matter / पदार्थ की अवस्थाएँ - गैस एवं द्रव Question Bank Critical Thinking

  • question_answer
    The molecular weight of \[{{O}_{2}}\] and \[S{{O}_{2}}\] are 32 and 64 respectively. If one litre of \[{{O}_{2}}\] at \[{{15}^{o}}C\] and 750 mm pressure contains 'N' molecules, the number of molecules in two litres of \[S{{O}_{2}}\] under the same conditions of temperature and pressure will be             [CBSE 1990; MNR 1991]

    A)                 \[N/2\]

    B)                 N

    C)                 2N         

    D)                 4N

    Correct Answer: C

    Solution :

                    At same temperature and pressure, equal volumes have equal number of molecules. If 1lit. of oxygen consists N molecules then at same temperature and pressure 1 lit of \[S{{O}_{2}}\] will consists N molecules. So 2 lit. of \[S{{O}_{2}}\] will contain \[2N\] molecules.


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