Chemistry Class-11: Chapter –4. Chemical Bonding and Molecular Structure Part – 1

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I. Multiple Choice Questions (Type-I)

Question: 1

Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs.

(i)

(ii)

(iii)

(iv)

Answer: (ii)

Question: 2

Polarity in a molecule and hence the dipole moment depends primarily on Electronegativity of the constituent atoms and shape of a molecule. Which of the following has the highest dipole moment?

(i)

(ii)

(iii)

(iv)

Answer: (iii)

Question: 3

The types of hybrid orbitals of nitrogen in NO2 + , NO3 – and NH4 + respectively are expected to be

(i)

(ii)

(iii)

(iv)

Answer: (ii)

Question: 4

Hydrogen bonds are formed in many compounds e.g., . The boiling point of such compounds depends to a large extent on the strength of hydrogen bond and the number of hydrogen bonds. The correct decreasing order of the boiling points of above compounds is :

(i)

(ii)

(iii) > HF >

(iv) > > HF

Answer: (ii)

Question: 5

In ion the formal charge on the oxygen atom of P–O bond is

(i)

(ii)

(iii)

(iv)

Answer: (ii)

Question: 6

In ion, the number of bond pairs and lone pairs of electrons on nitrogen 3 atom are

(i)

(ii)

(iii)

(iv)

Answer: (iv)

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