Question

In a diatomic molecule the bond distance is $$1 \times {10^{ - 8}}\,cm.$$   Its dipole moment is $$1.2\,D.$$  What is the fractional electronic charge on each atom?

A. 0.50
B. 1.2 × 10-10
C. 0.25  
D. 1.2
Answer :   0.25
Solution :
$$\eqalign{ & {\rm{Partial}}\,{\rm{charge}} = {{{\rm{Dipole}}\,{\rm{moment}}} \over {{\rm{Bond}}\,{\rm{distance}}}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = {{1.2 \times {{10}^{ - 18}}\,esu\,cm} \over {1 \times {{10}^{ - 8}}\,cm}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 1.2 \times {10^{ - 10}}\,esu \cr & {\rm{Fractional}}\,{\rm{charge}} = {{1.2 \times {{10}^{ - 10}}} \over {4.8 \times {{10}^{ - 10}}}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 0.25 \cr & \left( {4.8 \times {{10}^{ - 10}}\,{\rm{is}}\,{\rm{a}}\,{\rm{theoretical}}\,{\rm{value}}\,{\rm{of}}\,\mu .} \right) \cr} $$

Releted MCQ Question on
Inorganic Chemistry >> Chemical Bonding and Molecular Structure

Releted Question 1

The compound which contains both ionic and covalent bonds is

A. $$C{H_4}$$
B. $${H_2}$$
C. $$KCN$$
D. $$KCl$$
Releted Question 2

The octet rule is not valid for the molecule

A. $$C{O_2}$$
B. $${H_2}O$$
C. $${O_2}$$
D. $$CO$$
Releted Question 3

Element $$X$$ is strongly electropositive and element $$Y$$ is strongly electronegative. Both are univalent. The compound formed would be

A. $${X^ + }{Y^ - }$$
B. $${X^ - }{Y^{ + \,}}$$
C. $$X - Y$$
D. $$X \to Y$$
Releted Question 4

Which of the following compounds are covalent?

A. $${H_2}$$
B. $$CaO$$
C. $$KCl$$
D. $$N{a_2}S$$

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Chemical Bonding and Molecular Structure


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