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

The correct order of increasing ionic radii is

A
Mg2+ < Na+ < F$$-$$ < O2$$-$$ < N3$$-$$
B
N3$$-$$ < O2$$-$$ < F$$-$$ < Na+ < Mg2+
C
F$$-$$ < Na+ < O2$$-$$ < Mg2+ < N3$$-$$
D
Na+ < F$$-$$ < Mg2+ < O2$$-$$ < N3$$-$$
2
JEE Main 2022 (Online) 27th June Evening 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 : Fluorine forms one oxoacid.

Reason R : Fluorine has smallest size amongst all halogens and is highly electronegative.

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

A
Both A and R are correct and R is the correct explanation of A.
B
Both A and R are correct but R is NOT the correct explanation of A.
C
A is correct but R is not correct.
D
A is not correct but R is correct.
3
JEE Main 2022 (Online) 27th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

In 3d series, the metal having the highest M2+/M standard electrode potential is :

A
Cr
B
Fe
C
Cu
D
Zn
4
JEE Main 2022 (Online) 27th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The 'f' orbitals are half and completely filled, respectively in lanthanide ions :

[Given : Atomic no. Eu, 63; Sm, 62; Tm, 69; Tb, 65; Yb, 70; Dy, 66]

A
Eu2+ and Tm2+
B
Sm2+ and Tm3+
C
Tb4+ and Yb2+
D
Dy3+ and Yb3+
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