JEE Main & Advanced Chemistry States of Matter Question Bank Critical Thinking

  • question_answer A sample of \[{{O}_{2}}\] gas is collected over water at \[{{23}^{o}}C\] at a barometric pressure of 751 mm Hg (vapour pressure of water at \[{{23}^{o}}C\] is 21 mm Hg). The partial pressure of \[{{O}_{2}}\] gas in the sample collected is       [CBSE PMT 1993]

    A)                 21 mm Hg           

    B)                 751 mm Hg

    C)                 0.96 atm             

    D)                 1.02 atm

    Correct Answer: C

    Solution :

               Pressure of \[{{O}_{2}}\] (dry) = 751-21 = 730 mm Hg                                 \[=\frac{730}{760}=0.96atm\]


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