Question

The minimum no of carbon atom in ketones to show position isomerism

Answer 1

Minimum 5 carbon atoms are required for showing position isomers of ketone. Because in C-C=O-C ketone position is fixed i.e. 2, but incase of C-C-C=O-C ketone position is fixed as 2 with respect to change in the position of ketone group.

Answer 2

the bayer villiger oxidation is the oxidative cleavage of a carbon carbon bond adjacent to a carbonyl which converts ketones to esters and cyclic ketones to lectons.