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1
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
The incorrect statement(s) among (a) - (c) is (are)

(a) W(VI) is more stable than Cr(VI).
(b) In the presence of HCl, permanganate titrations provide satisfactory results.
(c) Some lanthanoid oxides can be used as phosphors.
A
(a) and (b) only
B
(a) only
C
(b) only
D
(b) and (c) only
2
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
The elements with atomic numbers 101 and 104 belong to, respectively :
A
Group 6 and Actinoids
B
Actinoids and Group 4
C
Group 11 and Group 4
D
Actinoids and Group 6
3
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
The ionic radii of O2–, F–, Na+ and Mg2+ are in the order :
A
F– > O2– > Na+ > Mg2+
B
Mg2+ > Na+ > F– > O2–
C
O2– > F– > Mg2+ > Na+
D
O2– > F– > Na+ > Mg2+
4
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Among the statements (I – IV), the correct ones are:
(I) Be has smaller atomic radius compared to Mg.
(II) Be has higher ionization enthalpy than Al.
(III) Charge/radius ratio of Be is greater than that of Al.
(IV) Both Be and Al form mainly covalent compounds.
A
(I), (II) and (IV)
B
(II), (III) and (IV)
C
(I), (III) and (IV)
D
(I), (II) and (III)
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