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 :

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

Tardigrade Admin · Accepted Answer

Rb Cs have nearly same electron gain enthalpy electron gain enthalpy =-46 kj / ml Ar Kr have same Δ H eq . Value is +96 kj / ml

Q. In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical ?
(A) $R b$ and $C s$
(B) $N a$ and $K$
(C) $A r$ and $Kr$
(D) $I$ and $A t$
Choose the correct answer from the options given below :

(A) and (B) only

(B) and (C) only

(A) and (C) only

(C) and (D) only

$R b$ & $C s$ have nearly same electron gain enthalpy electron gain enthalpy $= - 46 kj / m l A r$ & $Kr$ have same $Δ H_{e q}$ . Value is $+ 96$ $kj / m l$

Q. 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 :