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AIIMS AIIMS Solved Paper-1999

  • question_answer
    Pressure in a mixture of 4g of \[{{O}_{2}}\] and 2g of \[{{H}_{2}}\] confined in a bulb of 1 litre at \[{{0}^{o}}C\] is                    

    A)  45.215 atm  

    B)         31.205 atm        

    C)                         25.215 atm      

    D)         15.210 atm.                  

    Correct Answer: C

    Solution :

    Moles of oxygen, \[^{n}{{o}_{2}}=\frac{4}{32}=0.125mol\] Moles of Hydrogen, \[^{n}{{H}_{2}}=\frac{2}{2}=1.00mol\] Temperature = 273 K, volume = 1 Litre \[\Rightarrow \] Total pressure \[=\frac{({{n}_{O}}_{_{2}}+{{n}_{{{H}_{2}}}})\times RT}{V}\] \[=\frac{1.125\times 0.0821\times 273}{1}\] \[=25.215atm.\]


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