1
JEE Main 2023 (Online) 30th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

List I
(Atomic number)
List II
(Block of periodic table)
A. 37 I. p-block
B. 78 II. d-block
C. 52 III. f-block
D. 65 IV. s-block

Choose the correct answer from the options given below :

A
A - II, B - IV, C - I, D - III
B
A - IV, B - III, C - II, D - I
C
A - IV, B - II, C - I, D - III
D
A - I, B - III, C - IV, D - II
2
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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
3
JEE Main 2023 (Online) 25th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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
4
JEE Main 2022 (Online) 29th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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
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