In which of the following pairs, electron gain enthalpies of constitue

1.	In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical ? (A) Rb and Cs (B) Na and K (C) Ar and Kr (D) I and At Choose the correct answer from the options given below : (A) (A) and (B) only (B) (B) and (C) only (C) (A) and (C) only (D) (C) and (D) only
Answer» (C) (A) and (C) only Rb & Cs have nearly same electron gain enthalpy electron gain enthalpy = – 46 kj/ml Ar & Kr have same ΔH_eq . Value is + 96 kj/ml

In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical ? (A) Rb and Cs (B) Na and K (C) Ar and Kr (D) I and At Choose the correct answer from the options given below : (A) (A) and (B) only (B) (B) and (C) only (C) (A) and (C) only (D) (C) and (D) only

Answer»

(C) (A) and (C) only

Rb & Cs have nearly same electron gain enthalpy

electron gain enthalpy = – 46 kj/ml

Ar & Kr have same ΔH_eq . Value is + 96 kj/ml

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