CMC Medical CMC-Medical Ludhiana Solved Paper-2012

  • question_answer
    Which one of the following statement is incorrect for the sucrose?

    A)  It is obtained from cane sugar

    B)  It is not reducing sugar

    C)  On hydrolysis, it gives equal quantities of D-glucose and D-fructose

    D)  It gives aspartame when it is heated at \[210{}^\circ C\]

    Correct Answer: D

    Solution :

                    Sucrose obtained from canesugar. On hydrolysis of sucrose it gives equimolar mixture of D (+) glucose and D (-) fructose. sucrose\[\xrightarrow[\text{or}\,\,\text{invertase}]{{{\text{H}}^{\text{+}}}}\]D (+) glucose + D (-) fructose In sucrose, glucose is present in the pyranose form and fructose in the furanose form. Further since \[{{C}_{1}}-\alpha \]of glucose in connected to \[{{C}_{2}}-\beta \]of fructose, therefore sucrose is a non-reducing sugar.


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