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The observed rotation of 10ml of a solut...

The observed rotation of 10ml of a solution containing 2g of a compound when placed in 25cm long polarimeter tube is +`13.4^@`. What is the specific rotation of the compound?

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`alpha_(obs) = + 13.4^(@)` , C `=0.2gcm^(-3)` , Specific rotation ,`alpha = (+13.4)/(0.2 xx 2.5) = + 26.8^(@)`
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