Question

Ketones $\left( {{R_1}{\text{CO}}{{\text{R}}_2}} \right):{R_1} = {R_2} =$alkyl group, can be obtained in one step by
(1) Hydrolysis of esters
(2) Oxidation of ${1^\circ }$ alcohol
(3) Oxidation of ${2^\circ }$ alcohol
(4) Reaction of acid halides and alcohol

Answer 1

A ketone is a functional group in chemistry that has the form RCOR, where R can be any carbon-containing substituent. Carbonyl groups are found in ketone molecules. Acetone, with the formula $C{H_3}COC{H_3}$, is the most basic ketone. Ketones play an important role in biology and manufacturing.

Complete answer: Alcohols are a chemical family that includes compounds with one or more hydroxyl (-OH) groups bound to a single bonded alkane. The general formula -OH is used to describe alcohols. Alcohols are useful in organic chemistry because they can be converted into and out of a variety of other compounds.
A secondary alcohol is a compound in which a hydroxy group, OH, is attached to a saturated carbon atom that is also attached to two other carbon atoms.
The loss of electrons by a molecule, particle, or ion during a reaction is known as oxidation. When the oxidation state of a molecule, atom, or ion is raised, it is called oxidation. When an atom, molecule, or ion gains electrons or the oxidation state of an atom, molecule, or ion reduces, the mechanism is called reduction.
In organic chemistry, the oxidation of alcohols is a crucial reaction. Aldehydes and carboxylic acids are formed when primary alcohols are oxidised; ketones are formed when secondary alcohols are oxidised.

Note:
Ketones are compounds generated by your body when your cells do not receive enough glucose (blood sugar). Glucose is the body's primary energy supply. Ketones may be detected in the blood or urine. High ketone levels could suggest diabetic ketoacidosis (DKA), a diabetic complication that may result in a coma or even death.