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Question

# Statement - 1: The number of radial nodes in 3s and 4p orbitals are not equal. Statement - 2: The number of radial nodes in 3s and 4p orbitals depend on ‘n′ and ‘l′ which are different for 3s and 4p orbital.

A
Statement-1 is True, Statement-2 is True, Statement-2 is the correct explanation for Statement-1.
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B
Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.
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C
Statement-1 is True, Statement-2 is False.
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D
Statement-1 is False, Statement-2 is True
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Solution

## The correct option is D Statement-1 is False, Statement-2 is TrueNumber of radial nodes in any orbital is (n−l−1). Where, n and l are the Principal and the Azimuthal quantum numbers respectively. Thus, they depend upon both the values of ‘n′ and ‘l′. For 3s, n−l−1=3−0−1=2 and for 4p, n−l−1=4−1−1=2. Thus, number of radial nodes in 3s and 4p are equal.

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