Haryana PMT Haryana PMT Solved Paper-2007

  • question_answer
    An ideal solution is obtained by mixing\[C{{H}_{3}}CHB{{r}_{2}}\]and \[C{{H}_{2}}Br-C{{H}_{2}}Br\] in the ratio \[2:1,{{P}^{o}}_{C{{H}_{3}}CHBr}=173,\,{{P}^{o}}_{C{{H}_{2}}BrC{{H}_{2}}Br}=127\]

    A)  \[158\]                                

    B)  \[257\]

    C)  \[137\]                                

    D)  \[197\]

    Correct Answer: A

    Solution :

                    \[P={{x}^{1}}{{P}^{o}}_{C{{H}_{3}}CHBr}+{{x}^{2}}{{P}^{o}}_{C{{H}_{2}}BrC{{H}_{2}}Br}\] For \[C{{H}_{3}}CHBr\]         \[{{x}^{1}}=\frac{2}{2+1}=\frac{2}{3}\] For  \[C{{H}_{2}}BrC{{H}_{2}}Br\]  \[{{x}^{2}}=\frac{1}{2+1}=\frac{1}{3}\]                 \[P=\frac{2}{3}\times 173+\frac{1}{3}\times 127\]                 \[=157.66=158\]


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