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1
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : The ionic radii of O2$$-$$ and Mg2+ are same.

Reason (R) : Both O2$$-$$ and Mg2+ are isoelectronic species.

In the light of the above statements, choose the correct answer from the options given below.

A
Both (A) and (R) are true and (R) is the correct explanation of (A).
B
Both (A) and (R) are true but (R) is not the correct explanation of (A).
C
(A) is true but (R) is false.
D
(A) is false but (R) is true.
2
JEE Main 2022 (Online) 25th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct order of electron gain enthalpies of Cl, F, Te and Po is

A
F < Cl < Te < Po
B
Po < Te < F < Cl
C
Te < Po < Cl < F
D
Cl < F < Te < Po
3
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are the oxides:

Na2O, As2O3, N2O, NO and Cl2O7

Number of amphoteric oxides is :

A
0
B
1
C
2
D
3
4
JEE Main 2021 (Online) 31st August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Match List - I with List - II :

List - I
(Metal Ion)		 List - II
(Group of Qualitative analysis)
(a) $$M{n^{2 + }}$$ (i) Group - III
(b) $$A{s^{3 + }}$$ (ii) Group - IIA
(c) $$C{u^{2 + }}$$ (iii) Group - IV
(d) $$A{l^{3 + }}$$ (iv) Group - IIB


Choose the most appropriate answer from the options given below :
A
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
B
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
C
(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
D
(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
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