NEET Sample Paper NEET Sample Test Paper-15

  • question_answer The normality of solution obtained by mixing 10 ml of \[\frac{N}{5}HCl\] and 30 ml of \[\frac{N}{10}HCl\] is

    A)  \[\frac{N}{5}\]                                  

    B) \[\frac{N}{8}\]

    C) \[\frac{N}{15}\]                                 

    D) \[\frac{N}{7.5}\] 

    Correct Answer: B

    Solution :

    The normality of mixture is as follows: \[{{N}_{1}}{{V}_{1}}+{{N}_{2}}{{V}_{2}}+{{N}_{3}}{{V}_{3}}....=Nr\,Vr\] \[\frac{N}{5}\times 10+\frac{N}{10}\times 30=Nr\times 40\] \[2N+3N=40\,Nr\] \[5N+3N=40\,Nr\] \[Nr=\frac{5N}{40}=\frac{N}{8}\] Hence, the correct option is [b].

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