Evaluating Halogen Statements

Steps:

• Statement 1: Confirm halogens (F, Cl, Br, I, At) are non-metals forming diatomic molecules like Cl₂ and Br₂.
• Statement 2: Verify chlorine's reactivity displaces Br⁻ and I⁻ via reactions: Cl₂ + 2Br⁻ → 2Cl⁻ + Br₂; Cl₂ + 2I⁻ → 2Cl⁻ + I₂.
• Statement 3: Assess reactivity trend; halogens decrease in reactivity down Group 7 due to increasing atomic size and weaker electronegativity.
• Select option matching correct statements 1 and 2 only.

Why B is correct:

• B identifies statements 1 and 2 as true, aligning with halogen diatomic nature and chlorine's displacement ability per reactivity series.

Why the others are wrong:

• A includes incorrect statement 3 on reactivity trend.
• C excludes valid statement 2 on displacement reactions.
• D omits correct statement 1 about diatomic molecules.

Final answer: B