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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2004

  • question_answer
    56 g of nitrogen and 8g of hydrogen gas are heated in a closed vessel. At equilibrium 34 g of ammonia are present. The equilibrium number of moles of nitrogen, hydrogen and ammonia are respectively:

    A)  \[1,2,2\]

    B)  \[2,2,1\]

    C)  \[1,1,2\]

    D)  \[2,1,2\]

    Correct Answer: C

    Solution :

    \[{{N}_{2}}+3{{H}_{2}}2N{{H}_{3}}\]
    Initial \[\frac{56}{28}=2\] \[\frac{8}{2}=4\]
    At
    equilibrium \[(2-x)\] mol \[(4-3x)\] mol \[2x=\frac{34}{17}2\]mol
    Hence, no. of moles of \[{{N}_{2}}\] at equilibrium      \[=2-1=1\text{ }mol\]     No. of moles of \[{{H}_{2}}\] at equilibrium           \[=4-3=1mol\] No. of moles of \[N{{H}_{3}}\] at equilibrium \[=2mol\]


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