Compound whichrotates theplanepolarisedlightisknown asopticallyactivecompound. On thebasisofdirectionof rotationtwoformsof an opticallyactivecompoundsare termedas dextro andlaevo rotatory. The twoare termedas enantiomers. Ifwe have a1 : 1mixtureof d andl isomersof a given chiralcompound, opticalrotation of suchmixtureis zeroSucha mixtureis optically inactive and is calleda recemic modification. Thenetspecificrotation of any mixtureof the dand isomersof a givenchiral compoundis equalto the weightedaverageof the rotations due to boththe isomersMathematicallyif can beexpressedas : [alpha]_(net) =f_(d) [alpha_(d)] + f_(1) [alpha_(l)] Where f_(a) and f_(l)are fractionsof d and l isomersrespectively and [alpha_(d)] , [alpha_(l)] are theirspecificrotationsThe pure of isomerof certainchiralcompoundhas [alpha]_(d)^(25) =+ 55^(@) .A non racemicmixtureof thiscompoundhas a net [alpha]_(d)^(25) =- 11^(@) . Whatis thefractionsof thisisomer in mixture?

Compound whichrotates theplanepolarisedlightisknown asopticallyactivec

1.	Compound whichrotates theplanepolarisedlightisknown asopticallyactivecompound. On thebasisofdirectionof rotationtwoformsof an opticallyactivecompoundsare termedas dextro andlaevo rotatory. The twoare termedas enantiomers. Ifwe have a1 : 1mixtureof d andl isomersof a given chiralcompound, opticalrotation of suchmixtureis zeroSucha mixtureis optically inactive and is calleda recemic modification. Thenetspecificrotation of any mixtureof the dand isomersof a givenchiral compoundis equalto the weightedaverageof the rotations due to boththe isomersMathematicallyif can beexpressedas : [alpha]_(net) =f_(d) [alpha_(d)] + f_(1) [alpha_(l)] Where f_(a) and f_(l)are fractionsof d and l isomersrespectively and [alpha_(d)] , [alpha_(l)] are theirspecificrotationsThe pure of isomerof certainchiralcompoundhas [alpha]_(d)^(25) =+ 55^(@) .A non racemicmixtureof thiscompoundhas a net [alpha]_(d)^(25) =- 11^(@) . Whatis thefractionsof thisisomer in mixture?
Answer» 0. 40 0.6 0.3 0.70 Answer :1