Question

Match the List-I with List-II and select the correct set from the following sets given below:

List-I	List-II
(A) The number of sub-energy levels in an energy level	(1) $n^2$
(B) The number of orbitals in a sub-energy level	(2) $3d$
(C) The number of orbitals in an energy level	(3) $2l+1$
(D) $n=3,l=2,m=0$	(4) $n$

• A. (A) - 4, (B) - 3, (C) - 1, (D) - 2
• B. (A) - 3, (B) - 1, (C) - 2, (D) - 4
• C. (A) - 1, (B) - 2, (C) - 3, (D) - 4
• D. (A) - 3, (B) - 4, (C) - 1, (D) - 2

Answer 1

Answer: (A)

(A) - 4, (B) - 3, (C) - 1, (D) - 2

The number of sub energy levels $\to n$

The number of orbitals in sub energy levels $\to 2l+1$

The number of orbitals in energy level $\to n^2$

For 3d we have,$[l=0,\mathrm{1....}n,m=-2,-1,0,+1,+2]$

$n=3,l=2$ for orbital

Thus,

$n=3,l=2,m=0\to 3d$ orbital

Option A is correct.