Question

Read the passage given below and answer the following questions: (1x4=4)

Molecular orbitals are formed by the overlap of atomic orbitals .Two atomic orbitals combine

to form two molecular orbitals called bonding and antibonding molecular orbitals. The

molecular orbitals are filled with electrons following the same rules as followed for filling of

atomic orbitals . The molecular orbital electronic configurations help us to calculate bond

order which give important information about bond strength and bond length.

The following questions are multiple choice questions. Choose the most appropriate

answer:

(i)The calculated bond order in O2

- ions is :

(a)1 (b)1.5 (c)2 (d)2.5

(ii)Which of the following is paramagnetic :

(a)O2

-

(b)CN-

(c)CO (d)NO+

(iii)The bond strength is maximum in :

(a)O2

+

(b)O2

-

(c)O2 (d)O2

2-

(iv)Which of the following molecule/ion does not contain unpaired electron;

(a)N2

+

(b)O2

2-

(c)O2 (d)B2​

Answer 1

Answer:

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