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J & K CET Engineering J and K - CET Engineering Solved Paper-2004

  • question_answer
    \[100\,cc\]of \[\text{0}\text{.6}\,\text{N}\,{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]and \[\text{200 cc}\]of \[\text{0}\text{.3}\,\text{N}\,\text{HCl}\]were mixed together. The normality of the solution will be

    A)  0.2 N          

    B)  0.4 N

    C)  0.8 N          

    D)  0.6 N

    Correct Answer: B

    Solution :

     Normality of the mixed solution \[=\frac{{{N}_{1}}{{V}_{1}}+{{N}_{2}}{{V}_{2}}}{{{V}_{1}}+{{V}_{2}}}\] \[=\frac{0.6\times \frac{100}{100}+0.3\times \frac{200}{1000}}{\frac{100+200}{1000}}\] \[=\frac{0.6\times 0.1\times 0.3\times 0.2}{0.3}\] \[=\frac{0.06+0.06}{0.3}=\frac{0.12}{0.3}=0.4\,N\]


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