Question

What is the formal charge on carbon atom in the following two structures :
Chemical Bonding and Molecular Structure mcq question image

A. 0, - 2
B. 0, 0  
C. + 2, -2
D. + 1, - 1
Answer :   0, 0
Solution :
Chemical Bonding and Molecular Structure mcq solution image
Formal charge on $$C$$ atom = Valence electrons - Lone pair of electrons $$ - {1 \over 2}$$  × Bonding electron
$$\eqalign{ & = 4 - 0 - {1 \over 2} \times 8 \cr & = 0 \cr} $$
Similarly, formal charge on $$C$$ atom in other structure = 0

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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