JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry Question Bank Atomic Molecular and Equivalent masses

  • question_answer The molecular weight of a gas is 45. Its density at STP is [Pb. PMT  2004]

    A)                 22.4       

    B)                 11.2

    C)                 5.7         

    D)                 2.0

    Correct Answer: D

    Solution :

               The density of gas \[=\frac{\text{molecular wt}\text{. of metal}}{\text{volume}}\]                                         \[=\frac{45}{22.4}=2\,gm\,litr{{e}^{-1}}\]

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