Question

N-pentane and 2-methylbutane are a pair of?

Answer 1

Answer: n-pentane and 2-methylbutane are positional isomers.

Explanation:

In n-pentane all 5 carbons are in a line whereas in 2 methylbutane the chain is of 4 carbon attached with a methyl group on 2 no. Carbon.

Answer 2

Answer:

N-pentane and 2-methylbutane are a pair of constitutional/ chain isomerism.

Explanation:

• Because the entire number of carbon atoms in a molecule of 2-methylbutane is 5 and the total number of hydrogen atoms in a molecule of 2-methylbutane is 12, the chemical formula of 2-methylbutane is the same as that of pentane, C5H12, and pentane and 2-methylbutane are constitutional isomers.
• The variation in how the constituent atoms or groups are bonded to one another within the molecule, without any reference to space, causes constitutional isomerism or structural isomerism.
• Chain isomerism is the form of constitutional isomerism that arises between n-pentane and 2-methyl butane.
• When there is a change in the atomic arrangement of the carbon to the carbon chain of a molecule, it is called chain isomerism.
• Chain isomerism is a phenomenon that occurs when two or more compounds have the same type of chemical formula but different primary chains.
• Additional examples of Chain isomerism can be n-pentane and iso-pentane.

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