1
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
2
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
3
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
The plots of radial distribution functions for various orbitals of hydrogen atom against 'r' are given below :

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Structure of Atom Question 90 English
The correct plot for 3s orbital is :
A
(B)
B
(A)
C
(C)
D
(D)
4
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
According to Bohr's atomic theory :

(A) Kinetic energy of electron is $$ \propto {{{Z^2}} \over {{n^2}}}$$.

(B) The product of velocity (v) of electron and principal quantum number (n), $$'vn' \propto {Z^2}$$.

(C) Frequency of revolution of electron in an orbit is $$ \propto {{{Z^3}} \over {{n^3}}}$$.

(D) Coulombic force of attraction on the electron is $$ \propto {{{Z^3}} \over {{n^4}}}$$.

Choose the most appropriate answer from the options given below :
A
(A), (C) and (D) only
B
(A) only
C
(C) only
D
(A) and (D) only
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