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Q.

(A) : There are two nodal regions in 3s- orbital
(R) : There is no nodal plane in 3s orbital.

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a

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

b

‘A’ is true but ‘R’ is false

c

Both 'A' and 'R' are false

d

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) : There are two nodal regions in 3s- orbital

n =3 ,l=0

nodal regions =n-l-1 =3-1-1=1

(R) : There is no nodal plane in 3s orbital.

nodal planes for 3s orbital =l=0

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(A) : There are two nodal regions in 3s- orbital(R) : There is no nodal plane in 3s orbital.