(A) : Both $π (2 p_{x}) and π^{*} (2 p_{x})$ MO’s have one nodal plane each.
(R) : All MO’s formed by sideways overlapping of 2p-orbitals have one nodal p

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Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true and (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is D.

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Detailed Solution

π(2Px) and π*(2Px) MO's have one and two nodal planes respectively.

All bonding MO's formed by side way overlapping of 2p-orbitals have one nodal plane.

All antibonding MO's formed by side way overlapping of 2p-orbitals have two nodal planes.

Hence, Both Assertion and Reason are incorrect.

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