Question

write the formula for first member of ketone

Answer 1

The first member of Ketones is (IUPAC name) 2 - propanone. H3C - CO - CH3. This is also called Acetone

Answer 2

The simplest ketone is CH₃—C(=O)—CH₃. Its molecular formula is C₃H₆O. From this formula we can say that for “n” carbon atoms we need “2n” hydrogen atoms and an oxygen atom. Hence general formula of ketone is CnH₂nO.