1
JEE Main 2023 (Online) 29th January Evening Shift
+4
-1

Given below are two statements :

Statement I : The decrease in first ionization enthalpy from B to Al is much larger than that from Al to Ga.

Statement II : The d orbitals in Ga are completely filled.

In the light of the above statements, choose the most appropriate answer from the options given below

A
Statement I is correct but statement II is incorrect
B
Statement I is incorrect but statement II is correct
C
Both the statements I and II are correct
D
Both the statements I and II are incorrect
2
JEE Main 2023 (Online) 25th January Morning Shift
+4
-1

Inert gases have positive electron gain enthalpy. Its correct order is

A
He < Ne < Kr < Xe
B
He < Xe < Kr < Ne
C
Xe < Kr < Ne < He
D
He < Kr < Xe < Ne
3
JEE Main 2022 (Online) 29th July Morning Shift
+4
-1

The first ionization enthalpy of Na, Mg and Si, respectively, are : 496, 737 and $$786 \mathrm{~kJ} \mathrm{~mol}^{-1}$$. The first ionization enthalpy ($$\mathrm{kJ} \,\mathrm{mol}^{-1}$$) of $$\mathrm{Al}$$ is :

A
487
B
768
C
577
D
856
4
JEE Main 2022 (Online) 28th July Morning Shift
+4
-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
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