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Punjab Medical Punjab - MET Solved Paper-2009

  • question_answer
    \[60mL\]of\[\frac{N}{5}{{H}_{2}}S{{O}_{4}}\],\[10mL\]of\[\frac{N}{2}HN{{O}_{3}}\]and\[30mL\]of \[\frac{N}{10}HCl\]are mixed together. The strength of the resulting mixture is

    A) \[0.1N\]             

    B) \[0.2N\]

    C) \[0.3N\]             

    D) \[0.4N\]

    Correct Answer: B

    Solution :

    Strength of resulting mixture,                 \[N=\frac{{{N}_{1}}{{V}_{1}}+{{N}_{2}}{{V}_{2}}+{{N}_{3}}{{V}_{3}}}{{{V}_{1}}+{{V}_{2}}+{{V}_{3}}}\]                     \[=\frac{60\times \frac{N}{5}+10\times \frac{N}{2}+30\times \frac{N}{10}}{60+10+30}\]                     \[=0.2N\]


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