AIIMS AIIMS Solved Paper-2007

  • question_answer
    Specific rotation of sugar solution is 0.01 Sl units. \[200\,kg\,-{{m}^{-3}}\] of impure sugar solution is taken in a polarimeter tube of length 0.25 m and an optical rotation of 0.4 rad is observed, The percentage of purity of sugar in the sample is

    A)  11%  

    B)                                        20%                      

    C)  80% 

    D)        89%

    Correct Answer: C

    Solution :

                    Specific rotation of sugar solution is \[({{T}_{n}})\] \[{{T}_{i}}-{{T}_{n}}={{T}_{n}}-T\] \[{{T}_{i}}=2{{T}_{n}}-T\]   \[{{0}^{o}}C\] \[{{0}^{o}}C\] Thus, purity of sugar solution \[{{T}_{n}}=\frac{{{T}_{i}}}{2}\]


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