A 20 cm length of a certain solution causes right-handed rotation of 38°. A 30 cm length of another solution causes left-handed rotation of 24°. The optical rotation caused by 30 cm length of a mixture of the above solutions in the volume ratio 1 : 2 is
Text Solution
Verified by ExpertsThe correct answer is:
D
As θ θ ∝ ∝ l
Volume ratio 1 : 2 in a tube of length 30 cm means 10 cm length of first solution and 20 cm length of second solution .
Rotation produced by 10 cm length of first solution 
Rotation produced by 20 cm length of second solution
∴ ∴ Total rotation produced = 19° – 16° = 3°
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