Statement (I): A bonding MO has lower electron density above and below the inter-nuclear axis.

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Q.
Given below are two statements:

Statement (I): A $π$ bonding MO has lower electron density above and below the inter-nuclear axis.
Statement (II): The $π^{*}$ antibonding MO has a node between the nuclei.

In the light of the above statements, choose the most appropriate answer from the options given below: [2024]

1 Both Statement I and Statement II are true

2 Both Statement I and Statement II are false

3 Statement I is true but Statement II is false

4 Statement I is false but Statement II is true

Ans.
(4)

Statement (I): A $π$ bonding molecular orbital has higher electron density above and below the inter-nuclear axis. Thus statement (I) is false.

Statement (II): A $π^{*}$ antibonding molecular orbital has a nodal plane between nuclei. This is a true statement.

Solution

1 Both Statement I and Statement II are true

2 Both Statement I and Statement II are false

3 Statement I is true but Statement II is false

4 Statement I is false but Statement II is true

Ans.
(4)

Statement (I): A $π$ bonding molecular orbital has higher electron density above and below the inter-nuclear axis. Thus statement (I) is false.

Statement (II): A $π^{*}$ antibonding molecular orbital has a nodal plane between nuclei. This is a true statement.

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Solution

1 Both Statement I and Statement II are true

2 Both Statement I and Statement II are false

3 Statement I is true but Statement II is false

4 Statement I is false but Statement II is true

Ans. (4) Statement (I): A π bonding molecular orbital has higher electron density above and below the inter-nuclear axis. Thus statement (I) is false. Statement (II): A π* antibonding molecular orbital has a nodal plane between nuclei. This is a true statement.

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Ans.
(4)

Statement (I): A $π$ bonding molecular orbital has higher electron density above and below the inter-nuclear axis. Thus statement (I) is false.

Statement (II): A $π^{*}$ antibonding molecular orbital has a nodal plane between nuclei. This is a true statement.