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NEET Chemistry States of Matter / पदार्थ की अवस्थाएँ - गैस एवं द्रव NEET PYQ-States Of Matter

  • question_answer
    At \[25{}^\circ C\] and 730 mm pressure, 380 mL of dry oxygen was collected. If the temperature is constant, what volume will the oxygen occupy at 760 mm pressure?                                                                      [AIPMT 1999]

    A)  365 mL           

    B)       2 g                                                               

    C)  10 g    

    D)   20 g

    Correct Answer: A

    Solution :

    As the temperature is constant. Boyle’s law is applicable -
    \[{{P}_{1}}{{V}_{1}}={{P}_{2}}{{V}_{2}}\]
    \[{{V}_{1}}=380\,mL,\]
    \[{{P}_{1}}=730\,mm,\]
    \[{{V}_{2}}=?\]
    \[{{P}_{2}}=760\,mm\]
    \[730\times 380=760\times {{V}_{2}}\]
    \[{{V}_{2}}=\frac{730\times 380}{760}\]
    \[=\text{ }365\text{ }mL\]


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