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A 0.12kg of impure sugar is dissolved in...

A 0.12kg of impure sugar is dissolved in water and solution is mad eupto `8xx10^(-4)m^(3)`. A length of 20cm of this solution causes a rotation of `15^(@)`. If the specific rotation of sugar is `60xx10^(@) deg//decimetre kg `m^(-3)`, what is the purity of sugar?

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The correct Answer is:
0.853
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