1. Which of the following statements is/are true? A.1 only B.2 only C.3 only D.1

Question

1. Which of the following statements is/are true?

A.1 only

B.2 only

C.3 only

D.1 and 2

E.2 and 3

2.

Which of the following species has a bond order of 2.5?

A.NO–

B.CO

C.NO+

D.O2+

E.N2

3.

A.1/2

B.0

C.2

D.1

E.1 and 1/2

4.

Which of these statements about benzene is true?

A.Benzene contains only bonds between C atoms.

B.Benzene is an example of a molecule that displays ionic bonding.

C.The bond order of each C—C bond in benzene is 1.5.

D.All carbon atoms in benzene are sp3 hybridized.

E.All of these statements are false.

1. Electrons are never found in an antibonding molecular orbital. 2. Antibonding molecular orbitals have electron density mainly outside the space between the two nuclei. 3. All antibonding molecular orbitals are higher in energy than the atomic orbitals of which they are composed.

Explanation / Answer

1) E 2&3

2) D O2+

3) A 1/2

4) E All of these statements are false.

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