1
JEE Main 2022 (Online) 27th July Evening Shift
+4
-1

The correct decreasing order of energy for the orbitals having, following set of quantum numbers :

(A) n = 3, l = 0, m = 0

(B) n = 4, l = 0, m = 0

(C) n = 3, l = 1, m = 0

(D) n = 3, l = 2, m = 1

is :

A
(D) > (B) > (C) > (A)
B
(B) > (D) > (C) > (A)
C
(C) > (B) > (D) > (A)
D
(B) > (C) > (D) > (A)
2
JEE Main 2022 (Online) 27th July Evening Shift
+4
-1

Outermost electronic configurations of four elements A, B, C, D are given below :

(A) $$3 s^{2}$$

(B) $$3 s^{2} 3 p^{1}$$

(C) $$3 s^{2} 3 p^{3}$$

(D) $$3 s^{2} 3 p^{4}$$

The correct order of first ionization enthalpy for them is :

A
(A) < (B) < (C) < (D)
B
(B) < (A) < (D) < (C)
C
(B) < (D) < (A) < (C)
D
(B) < (A) < (C) < (D)
3
JEE Main 2022 (Online) 27th July Morning Shift
+4
-1

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Energy of $$2 \mathrm{s}$$ orbital of hydrogen atom is greater than that of $$2 \mathrm{s}$$ orbital of lithium.

Reason R: Energies of the orbitals in the same subshell decrease with increase in the atomic number.

In the light of the above statements, choose the correct answer from the options given below.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is NOT the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.
4
JEE Main 2022 (Online) 25th July Morning Shift
+4
-1

Which of the following sets of quantum numbers is not allowed?

A
$$\mathrm{n}=3,1=2, \mathrm{~m}_{\mathrm{l}}=0, \mathrm{~s}=+\frac{1}{2}$$
B
$$\mathrm{n}=3, \mathrm{l}=2, \mathrm{~m}_{\mathrm{l}}=-2, \mathrm{~s}=+\frac{1}{2}$$
C
$$\mathrm{n}=3, \mathrm{l}=3, \mathrm{~m}_{\mathrm{l}}=-3, \mathrm{~s}=-\frac{1}{2}$$
D
$$\mathrm{n}=3, \mathrm{l}=0, \mathrm{~m}_{1}=0, \mathrm{~s}=-\frac{1}{2}$$
JEE Main Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
EXAM MAP
Joint Entrance Examination