Question

what is the answer?​

Answer 1

Explanation:

Which is not the position isomer of I ?

I = chloromethyl cyclohexane

Solution:

• Same molecular formula, different structural formula, are said to be positional isomers.

Or

• For a compound to be a Position isomer it must differ in it's IUPAC Name.

It means,

If IUPAC name of Compound I, match with any compound in given option then that compound doesn't show position isomerism.

Now,

Let's check IUPAC name of all options :

a. Chloromethyl cyclohexane

b. 1-chloro-1-methyl cyclohexane

c. 1-chloro-2-methyl cyclohexane

d. 1-chloro-3-methyl cyclohexane

Here, we see that IUPAC name of option a. is same as Compound I given.

So,

It doesn't show P.I. (position isomerism)

Therefore,

Option A is correct ✔