Question

Cyclohexane on Chlorination gives
(A) Chloro cyclohexane
(B) 1,2 dichlorocyclohexane
(C) 1,4 dichlorocyclohexane
(D) a mixture of all the above

Answer 1

Cyclohexane is a molecule made up of carbon and hydrogen and forms a closed ring like structure. In cyclohexane six carbon are attached to each other with a single bond. And each carbon is attached with two hydrogen atoms.

Complete step by step answer:
${C_6}{H_6}$ is the molecular formula of cyclohexane. It is insoluble in water or polar molecules. Because cyclohexane is a nonpolar molecule so it dissolves only in non-polar molecules like ether, acetone.
Chlorine$C{l_2}$ is a bimolecular gas; it means two atoms of chlorine bind each other to form a single chlorine molecule.
Cyclohexane on Chlorination is free radical mechanism it occur in two steps-
Step 1) Formation of free radical- In it which bimolecular chlorine molecule is formed in which a single covalent bond is present between two covalently bonded atoms. Due to the same electronegativity of both chlorine atoms when this single bond breaks then each chlorine atom takes one electron. The chlorine atom carry single extra free electron this is called chlorine free radical
$Cl - Cl \to 2\mathop {Cl}\nolimits^O$
In this step two chlorine free radicals are formed.
Step 2) Attack free radical on cyclohexane- This free radical attack on cyclohexane molecule and formed cyclohexane are formed. But this reaction does not occur at room temperature because cyclohexane is alkane and alkanes are very less reactive in nature so this reaction requires high temperature or UV radiations.
${C_6}{H_6} + \mathop {Cl}\nolimits^O \to {C_6}{H_5}Cl$
Hence option A is the correct option. Cyclohexane on Chlorination gives chloro cyclohexane.

Note:
Cyclohexane is colourless in nature and the melting point of cyclohexane is ${6.47^o}C$ and the boiling point of cyclohexane is ${80.74^O}C$.
The molecular mass of Cyclohexane is $84.75g/mol$.
Cyclohexane has a detergent like smell and it is very useful as a cleaning agent.
Cyclohexane is flammable in nature.