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  3. BHU PMT

BHU PMT BHU PMT Solved Paper-2001

  • question_answer
    The vapour density of a gas A is four times than B. If molecular mass of B is 1, then molecular mass of A is:

    A)  1                                            

    B)  2

    C)  1/4                                       

    D)  4

    Correct Answer: D

    Solution :

                     Given, molecular mass of gas B = 1 \[\therefore \]vapour density of gas\[B=\frac{1}{2}\] \[\because \]vapour density of A is 4 times of B \[\therefore \]vapour density of\[A=\frac{1}{2}\times 4=2\] \[\therefore \]molecular mass of\[A=2\times 2=4\].         (\[\because \]\[molecular\text{ }mass=2\times vapour\text{ }density\])


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