Question

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 1

Answer: (C)

(A) and (C) only

Answer 2

The correct option is(C): (A) and (C) only.