JEE Main & Advanced Chemistry States of Matter Question Bank Ideal gas equation and Related gas laws

  • question_answer A gas diffuse at a rate which is twice that of another gas B. The ratio of molecular weights of A to B is      [EAMCET 1986]

    A)                 1.0         

    B)                 0.75

    C)                 0.50       

    D)                 0.25

    Correct Answer: D

    Solution :

                    \[\frac{{{M}_{A}}}{{{M}_{B}}}={{\left( \frac{{{r}_{B}}}{{{r}_{A}}} \right)}^{2}}\because {{r}_{A}}=2{{r}_{B}}\]  \[\therefore \frac{{{r}_{B}}}{{{r}_{A}}}=\frac{1}{2}\] \[=\frac{1}{{{(2)}^{2}}}\] \[=\frac{1}{4}=.25\]

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