Question

two gaseous elements belong to the same group in the periodic table. The relatively heavier element has more negative value of electron gain enthalpy than the lighter one, though the later possesses higher electro-negativity than the former. Identify the two elements.
(A)F and Cl
(B)Cl and Br
(C)O and S
(D)H and Cl​

Answer 1

Answer:

A, because both are gaseous and Cl is more electro- negative

Explanation:

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Answer 2

Answer:

(A)F and Cl

Explanation:

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