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Question

Invert sugar is


A
leavorotatory
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B
dextrorotatory
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C
optically inactive
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D
racemic mixture
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Solution

The correct option is D leavorotatory
Invert sugar is a mixture of equal parts of glucose and fructose resulting from the hydrolysis of sucrose (saccharose). The name stems from the fact that it rotates plane polarized light in the opposite direction of sucrose. Sucrose is dextrorotatory - it rotates plane polarized light clockwise $$(D = +66.5)$$. Invert sugar rotates the plane of the polarized light counterclockwise $$(D = -22)$$ due to the strongly levorotatory nature of fructose $$(D = -92)$$.

Chemistry

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