\( 80 \mathrm{gm} \) of impure sugar when dissolved in a litre of w...

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\( 80 \mathrm{gm} \) of impure sugar when dissolved in a litre of water gives an optical rotation of \( 9.9^{\circ} \) when placed in a tube of length
\( \mathrm{P} \) \( 20 \mathrm{~cm} \). If concentration of sugar solution is \( 75 \mathrm{gm} / \) litre then

W specific rotation of sugar is :
(A) \( 44^{\circ} \)
(B) \( 55^{\circ} \)
(C) \( 66^{\circ} \)
(D) \( 73^{\circ} \)
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