Radial probability distribution curve is shown for $s$ -orbital. The curve is:

1 s

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2 s

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3 s

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4 s

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Solution

The correct option is A $1 s$
Radial probability distribution curve is shown for s -orbital. The curve is of 1s orbital as it has zero radial nodes.
The number of radial nodes $= n - l - 1$ .
For 1s orbital, the number of radial nodes $= 1 - 0 - 1 = 0$
For 2s orbital, the number of radial nodes $= 2 - 0 - 1 = 1$
For 3s orbital, the number of radial nodes $= 3 - 0 - 1 = 2$
For 4s orbital, the number of radial nodes $= 4 - 0 - 1 = 3$

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List - I	List - II
I) Radial probability distribution curve of 3s orbital	a) $1.1 ˚ A$
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) $0.53 ˚ A$

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