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Specific rotation of sugar solution is 0...

Specific rotation of sugar solution is `0.01 SI` units. `200 kg-m^(-3)` of impure sugar solution is taken in a polarimeter tube of length `0.25m` and an optical rotation of `0.4` rad is observed. The percentage of purity of sugar in the sample is

A

(a) 80%

B

(b) 89%

C

(c) 11%

D

(d) 20%

Text Solution

Verified by Experts

The correct Answer is:
A
Specific rotation
`(alpha)=(theta)/(lc)impliesc=(theta)/(alphal)=(0.4)/(0.01xx0.25)=160kg//m^3`
Now percentage purity of sugar solution
`=(160)/(200)xx100=80%`
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