EVERYDAY SCIENCE

Detailed explanation-1: -Pentan 2-ol exhibits optical isomerism as it is having chiral carbon at 2nd Carbon. Hence it is true.

Detailed explanation-2: -CH3−CH2−CH2−CH2−CH3(C5H12) is not a isomer of pentane because the number of carbon is different from the number of carbon in pentane.

Detailed explanation-3: -The carbon atoms can be bonded to make a four carbon chain (butane) or there can be a one carbon branch from a three carbon chain (2-methylpropane). Butane and 2-methylpropane are structural isomers because they both have the chemical formula C4H10. The rotation about single bonds creates dynamic molecules.

Detailed explanation-4: -In pentanol, the hydroxyl group can be placed on one of three carbons to produce three distinct isomers. These isomers are called: 1-pentanol, 2-pentanol, and 3-pentanol. These three isomers of pentanol represent primary, secondary, and tertiary alcohol hydrocarbons.