NEET Sample Paper NEET Sample Test Paper-50

  • question_answer The pressure and volume of a given mass of gas at a given temperature are P and V respectively. Keeping temperature constant, the pressure is increased by 10% and then decreased by 10%. The volume now will be-

    A) less than V

    B) more than V

    C) equal to V

    D) less than V for diatomic and more than V for monoatomic

    Correct Answer: B

    Solution :

    When the pressure is first increased by \[10%\] it becomes (110/100) P. when it is decreased by \[10%\] from there, the pressure becomes \[\frac{110\times 90}{100\times 100}\,\,\,\,P\,\,=\,\,\frac{99}{100}\,P\] Thus the pressure decreases by \[1%\] volume is increased by nearly \[1%\]

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