Question

$${N_2}$$  and $${O_2}$$  are converted into monocations, $$N_2^ + $$  and $$O_2^ + $$  respectively. Which of the following statements is wrong?

A. In $$N_2^ + ,N - N$$   bond weakens
B. In $$O_2^ + ,$$  the $$O - O$$  bond order increases
C. In $$O_2^ + ,$$  paramagnetism decreases
D. $$N_2^ + $$  becomes diamagnetic  
Answer :   $$N_2^ + $$  becomes diamagnetic
Solution :
$$\sigma _b^2\sigma _a^{_ * 2}\sigma _b^2\sigma _a^{^ * 2}\left( {\pi _b^2 = \pi _b^2} \right)\sigma _b^1\left( {N_2^ + = 13\,{\text{electrons}}} \right)$$
it contains one unpaired electron hence paramagnetic

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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