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

  • question_answer
    At what temperature will the average speed of \[C{{H}_{4}}\]molecules have the same value as \[{{O}_{2}}\] has at 300 K [CBSE PMT 1989]

    A)                 1200 K  

    B)                 150 K

    C)                 600 K    

    D)                 300 K

    Correct Answer: B

    Solution :

    \[\frac{{{V}_{av}}C{{H}_{4}}}{{{V}_{ab}}{{O}_{2}}}=\sqrt{\frac{{{T}_{C{{H}_{4}}}}}{{{T}_{{{O}_{2}}}}}.\frac{{{M}_{{{O}_{2}}}}}{{{M}_{C{{H}_{4}}}}}}=1\]                                 \[\frac{{{T}_{C{{H}_{4}}}}}{300}.\frac{32}{16}=1\]; \[{{T}_{C{{H}_{4}}}}={{150}^{o}}K\]


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