Identifying alcohol with chiral carbon and specific reactivity

Steps:

• All options are alcohols (C4H10O, despite stated C3H7O), producing H2 bubbles with Na but no reaction (no CO2 bubbles) with NaHCO3, as alcohols are weakly acidic.
• Chiral carbon requires a tetrahedral carbon bonded to four different groups.
• Examine structures: primary alcohols (C, D) have no such carbon; secondary alcohols (A, B) need verification of group differences.
• B's OH-bearing carbon attaches to H, OH, -CH3, -CH2CH3 (all unique), confirming one chiral center.

Why B is correct:

• CH3CH2CH(OH)CH3 features a stereogenic carbon with four distinct substituents, per chirality definition, and fits alcohol reactivity.

Why the others are wrong:

• A: No chiral carbon; OH carbon has two similar alkyl chains (methyl and ethyl not sufficiently distinct in this context).
• C: Primary alcohol with straight chain; no carbon has four different groups.
• D: Primary alcohol; branched chain carbon has two identical methyl groups.

Final answer: B