1.

'X' is an optically active alkane having lowest moleculr mass, product the structure of the major product obtained on monochlorination of 'X'.

Answer»

`CH_(3)-CH_(2)-CH_(2)-overset(CH_(3))overset("|")underset("CL ")underset("|")"C "-CH_(2)-CH_(3)`
`CH_(3)-CH_(2)-CH_(2)-overset(CH_(3))overset("|")"CH"-underset("Cl ")underset("|")"CH"-CH_(3)`
`CH_(3)-CH_(2)-CH_(2)-overset(CH_(3))overset("|")"CH"-CH_(2)-CH_(2)-Cl`
`Cl-CH_(2)-CH_(2)-CH_(2)-overset(CH_(3))overset("|")"CH"-CH_(2)-CH_(3)`

Solution :3-methyl HEXANE is an optically active having lowest molecular mass.
`CH_(3)-CH_(2)-CH_(2)-overset(CH_(3))overset("|")underset("H")underset("|")"C "-CH_(2)-CH_(3)overset(Cl_(2))underset(hv)rarrCH_(3)-CH_(2)-CH_(2)-overset(CH_(3))overset("|")underset("Cl ")underset("|")"C "-CH_(2)-CH_(3)`


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