1
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The region in the electromagnetic spectrum where the Balmar series lines appear is :
A
Microwave
B
Ultraviolet
C
Visible
D
Infrared
2
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the hypothetical situation where the azimuthal quantum number, $$l$$, takes values 0, 1, 2, ....., n + 1, where n is the principal quantum number. Then, the element with atomic number :
A
13 has a half-filled valence subshell
B
9 is the first alkali metal
C
8 is the first noble gas
D
6 has a 2p-valence subshell
3
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The number of subshells associated with n = 4 and m = –2 quantum numbers is
A
8
B
2
C
16
D
4
4
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The figure that is not a direct manifestation of the quantum nature of atoms is :
A
JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Structure of Atom Question 114 English Option 1
B
JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Structure of Atom Question 114 English Option 2
C
JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Structure of Atom Question 114 English Option 3
D
JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Structure of Atom Question 114 English Option 4
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