(A) : The radial probability distribution curves of 1s, 2p, 3d orbitals are identical in shape.
(R) : The number of nodal planes present in these orbitals is different.

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Both ‘A’ and ‘R’ are true and ‘R’ is the correct explanation of ‘A’.

‘A’ is true but ‘R’ is false

Both 'A' and 'R' are false

Both ‘A’ and ‘R’ are true and ‘R’ is not the correct explanation of ‘A’

answer is B.

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Detailed Solution

(A) : The radial probability distribution curves of 1s, 2p, 3d orbitals are identical in shape.

Radial nodes =n-l

1s orbital =1-0 =1

2p orbital =2-1=1

3d orbital =3-2=1

(R) : The number of nodal planes present in these orbitals is different.

l=0 for s -orbital

l=1 for p -orbital

l=2 for d -orbital

so both assertion and reason are true but ‘R’ is not the correct explanation of ‘A’

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