Pravansu Panda posted an Question
September 22, 2021 • 23:15 pm 30 points
  • IIT JAM
  • Chemistry (CY)

(d) 16 73. the enantiomeric excess and observed specific rotation of a mixture containing 6 g of (+)-2-butanol and 4 (g) of ()-2-butanol are respectively (if th

(d) 16 73. The enantiomeric excess and observed specific rotation of a mixture containing 6 g of (+)-2-butanol and 4 (g) of ()-2-butanol are respectively (If the specific rotation of enantiomerically pure (+)-2-butanol is +13.5 units) (a) 80%, +2.7 unit (c) 20%o, +2.7 unit (b) 20%,-27 unit (d) 80%,-27 unit

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  • Suman Kumar Best Answer

    As the difference is 2g so the optical rotation is due to excess 2g of (+) compound. 2g/10g which is equal to 20%. Now 100% + compound has a specific rotation is 13.5 unit for 20% calculation just take 20% of 13.5 which is equal to 2.7 unit. Option C is correct.

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