Ncert Exercises & Solutions

Select the correct option based on statements below:

Assertion (A):	The IUPAC name of the compoundis 2-ethoxy-2-methylethane.
Reason (R):	In IUPAC nomenclature, ether is regarded as a hydrocarbon derivative in which a hydrogen atom is replaced by —OR or -OAr group [where, R = alkyl group and Ar = aryl group].

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.

Hint: Alkoxyalkane

The given compound is as follows:

${CH}_{3} - CH - O - {CH}_{2} - {CH}_{2} - {CH}_{3}$
$I$
${CH}_{3}$

The parent chain is propane and an isopropoxy group is attached at the first position. Hence, the correct IUPAC name of the compound is 1-Isopropoxypropane.

Hence, the Assertion is wrong.

The general formula of ether is ROR. In IUPAC nomenclature, ether is regarded as a hydrocarbon derivative in which a hydrogen atom is replaced by —OR or —OAr group [where, R = alkyl group and Ar = aryl group].

Hence, the Reason is correct.

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