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NEET Sample Paper NEET Sample Test Paper-42

  • question_answer
    Pressure of a mixture of 4g of \[{{\operatorname{O}}_{2}} and 2g of {{H}_{2}}\] confined in a bulb of 1 litre at \[\operatorname{O}{}^\circ C\] is:

    A) 25.215 atm      

    B) 31.205 atm

    C) 45.215 atm      

    D) 15.210 atm

    Correct Answer: A

    Solution :

    \[^{n}{{O}_{2}}=\frac{4}{32}=\frac{1}{8}mol\] \[^{n}{{H}_{2}}=\frac{2}{2}=1\,\,mol\] \[\operatorname{n}={{\,}^{n}}{{O}_{2}}+{{\,}^{n}}{{H}_{2}}=\frac{1}{8}+1=\frac{9}{8}\,\,mol\] [ideal gas eqn] \[\operatorname{p}=\frac{nRT}{v}\] \[=\frac{\frac{9}{8}\times 0.0821\times 273}{1}=25.215\,\,atm\]


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