1
JEE Main 2021 (Online) 18th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
The ionic radius of Na+ ions is 1.02 $$\mathop A\limits^o $$. The ionic radii (in $$\mathop A\limits^o $$) of Mg2+ and Al3+, respectively, are
A
1.05 and 0.99
B
0.72 and 0.54
C
0.85 and 0.99
D
0.68 and 0.72
2
JEE Main 2021 (Online) 18th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
A certain orbital has no angular nodes and two radial nodes. The orbital is :
A
2s
B
3s
C
3p
D
2p
3
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Which of the following forms of hydrogen emits low energy $$\beta$$- particles?
A
Tritium $$_1^3$$H
B
Proton H+
C
Protium $$_1^1$$H
D
Deuterium $$_1^2$$H
4
JEE Main 2021 (Online) 26th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
The orbital having two radial as well as two angular nodes is :
A
3p
B
5d
C
4d
D
4f
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