JEE Main & Advanced JEE Main Paper (Held On 12-Jan-2019 Morning)

  • question_answer
    The volume of gas A is twice than that of gas B. The compressibility factor of gas A is thrice than that of gas B at same temperature. The pressures of the gases for equal number of moles are [JEE Main Online Paper Held On 12-Jan-2019 Morning]

    A) \[2{{P}_{A}}=3{{P}_{B}}\]                            

    B) \[3{{P}_{A}}=2{{P}_{B}}\]

    C) \[{{P}_{A}}=2{{P}_{B}}\]                  

    D)   \[{{P}_{A}}=3{{P}_{B}}\]

    Correct Answer: A

    Solution :

    \[{{Z}_{A}}=\frac{{{P}_{A}}{{V}_{A}}}{nR{{T}_{A}}},{{Z}_{B}}=\frac{{{P}_{B}}{{V}_{B}}}{nR{{T}_{B}}}\] Given,\[{{T}_{A}}={{T}_{B}}\]           n = same \[{{V}_{A}}=2{{V}_{B}}\]      \[{{Z}_{A}}=3{{Z}_{B}}\] Then,\[{{Z}_{A}}=\frac{{{P}_{A}}\times 2{{V}_{B}}}{nR{{T}_{A}}}=3{{Z}_{B}}=\frac{3{{P}_{B}}{{V}_{B}}}{nR{{T}_{B}}}\] \[{{P}_{A}}\times 2{{V}_{B}}=3{{P}_{B}}{{V}_{B}},2{{P}_{A}}=3{{P}_{B}}\]


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