Question

Following are the structures of four isomer of hexane. Among the names given below, which correctly identifies the fifth isomer ?
${CH}_3{CH}_2{CH}_2{CH}_2{CH}_2{CH}_3$ ${\left({CH}_3\right)}_3{CCH}_2{CH}_3$
${\left({CH}_3\right)}_2{CHCH}_2{CH}_2{CH}_3$ ${\left({CH}_3\right)}_{2}CHCH{{(CH}_2)}_2$

• A. 2-Methyl pentane
• B. 2-Ethyl butane
• C. 2,3-Dimethyl butane
• D. 3-Methyl pentane

Answer 1

The correct option is D 3-Methyl pentane

Among the names given below the fifth isomer is

$3-Methylpentane$

Hence option (A) is correct