Question

List - I	List - II
I) Radial probability distribution curve of 3s orbital	a) $1.1\mathring{A}$
II) Distance of maximum probability of 1s electron	b) 1s orbital
III) Radial node for a 2s electron	c) 3 peaks, 2 radial nodes
IV) No spherical nodes	d) $0.53\mathring{A}$

The correct match is:

• A. I-a, II-b, III-c, IV-d
• B. I-c, II-d, III-a, IV-b
• C. I-b, II-a, III-d, IV-c
• D. I-d, II-a, III-b, IV-c

Answer 1

The correct option is B I-c, II-d, III-a, IV-b

I) The radial probability distribution curve of 1s orbital has 1 peak and 0 radial node.
The radial probability distribution curve of 2s orbital has 2 peaks and 1 radial node.
The radial probability distribution curve of 3s orbital has 3 peaks and 2 radial nodes.

II) The probability of finding an electron at the nucleus is zero. As the distance from the nucleus increases, the probability of finding electron increases. The probability of finding an electron is maximum at a distance of $0.53\mathring{A}$. It is known as Bohr's first radius.

III) Radial node for a 2s electron is at a distance of $1.1\mathring{A}$. There are 2 peaks and 1 radial node for 2s orbital.

IV) The number of spherical node in 1s orbital is $n-1-l=1-1-0=0$.