Which of the following statements regarding orbitals is false?

1 s

orbital has one nodal region.

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2 s

orbital is spherical with one nodal region.

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2 p_{x}

orbital is dumb bell with one nodal plane.

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3 d_{x y}

orbital has two nodal planes.

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Solution

The correct option is A $1 s$ orbital has one nodal region.
Number of nodes $= (n + l - 1)$ .

Thus for $1 s$ orbital number of nodes $= (1 + 0 - 1) = 0$

Hence statement A is false as for $1 s$ there is no nodal region.

Thus the correct option is A.

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Column - I	Column - II
1. The orbital with 4 total nodes	a. $3 s$
2. The orbital with one nodal plane	b. $5 s$
3. The orbital with 2 nodal regions	c. $5 d$
4. The orbital with no nodal plane	d. $4 p$