CMC Medical CMC-Medical VELLORE Solved Paper-2009

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

    A)  0.1 N                                    

    B)  0.2 N

    C)  0.3 N                                    

    D)  0.4 N

    Correct Answer: B

    Solution :

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


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