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NEET Sample Paper NEET Sample Test Paper-19

  • question_answer
    70 calories of heat is required to raise the temperature of 2 moles of an ideal gas at constant pressure from \[40{}^\circ C\] to \[45{}^\circ C\] (R = 2\[cal/mol{{\,}^{-0}}C\]). The gas may be

    A) \[{{H}_{2}}\]                           

    B) \[He\]

    C) \[C{{O}_{2}}\]                        

    D) \[N{{H}_{3}}\]  

    Correct Answer: A

    Solution :

    \[dQ=n{{C}_{P}}dT\]or \[{{C}_{P}}=\frac{dQ}{ndT}=\frac{70}{ndT}=\frac{70}{2.5}=\frac{7}{2}(R)\] i.e., the gas is diatomic or it is\[{{H}_{2}}\] Hence, the correction option is [a].


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