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Q.

Which of the following statements is/are correct?

 

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a

The molecular orbitals are essentially identical to the relevant atomic orbitals at very high energy differences

b

Dominantly ionic compounds of group I have HOMO-LUMO energy gap in visible region generally.

 

c

Coloured covalent diatomic molecules have HOMO-LUMO energy gap in ultraviolet region.

 

d

All of the above.

answer is A.

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Detailed Solution

Statement A is correct. the molecular orbitals are essentially identical to the relevant atomic orbitals at very high energy differences.

The bonding molecular orbitals are lower in energy than the atomic orbitals because of the increased stability associated with the formation of a bond.

Hence, the option A is correct.

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