M.O.T NCERT Exemplar (Objective) Based MCQs Chemical Bonding and Molecular Structure Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

The species that does not have unpaired electrons is:

1.	$N^+_2$	2.	$O_2$
3.	$O^{2-}_2$	4.	$B_2$

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Among the following, the correct order of energies of molecular orbitals of N₂ is:

1. $(π 2 p_{y}) < (σ 2 p_{z}) < (π * 2 p_{x}) \approx (π * 2 p_{y})$

2. $(π 2 p_{y}) > (σ 2 p_{z}) > (π * 2 p_{x}) \approx (π * 2 p_{y})$

3. $(π 2 p_{y}) < (σ 2 p_{z}) \approx (π * 2 p_{x}) \approx (π * 2 p_{y})$

4. $(π 2 p_{y}) > (σ 2 p_{z}) < (π * 2 p_{x}) \approx (π * 2 p_{y})$

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From the perspective of molecular orbital theory, which statement is false?

1.	${Be}_{2}$ is not a stable molecule.
2.	${He}_{2}$ is not stable but ${He}_{2}^{+}$ is expected to exist.
3.	Bond strength of $N_{2}$ is maximum amongst the homonuclear diatomic molecules belonging to the second period.
4.	The order of energies of molecular orbitals in $N_{2}$ molecule is: $σ_{2 s} < σ_{2 s}^{} < σ_{2 p_{z}} < (π_{2 p_{x}} \approx π_{2 p_{y}})$ $< (π_{2 p_{x}}^{} \approx π_{2 p_{y}}^{}) < σ_{2 p_{z}}^{}$

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What is the correct sequence of bond order for the specified species?

1.	$\mathrm{O}^-_2>\mathrm{O}_2>\mathrm{O}^+_2$	2.	$\mathrm{O}^-_2<\mathrm{O}_2<\mathrm{O}^+_2$
3.	$\mathrm{O}^-_2>\mathrm{O}_2<\mathrm{O}^+_2$	4.	$\mathrm{O}^-_2<\mathrm{O}_2>\mathrm{O}^+_2$

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Match the species in Column I with the bond order in Column II.

	Column I		Column II
A.	NO	1.	1.5
B.	CO	2.	2.0
C.	$O_2^-$	3.	2.5
D.	O₂	4.	3.0

Choose the correct option:

Options:	A	B	C	D
1.	3	4	1	2
2.	1	2	3	5
3.	5	4	3	2
4.	4	5	3	2

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Which of the following have identical bond order?

(a) ${CN}^{-}$

(b) ${NO}^{+}$

(d) $O_{2}^{2 -}$

Choose the correct option

1. (a), (b)

2. (b), (c)

3. (c), (d)

4. (b), (d)

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Diamagnetic species are those which contain no unpaired electrons. Among the following, diamagnetic species are

(a)	$N_{2}$	(b)	$N_{2}^{2 -}$
(C)	$O_{2}$	(d)	$O_{2}^{2 -}$

Choose the correct option:

1.	(a), (d)	2.	(b), (c)
3.	(c), (d)	4.	(b), (d)

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Identify the species with identical bond orders from the following options.

(a) $N_{2}$

(b) $N_{2}^{-}$

(d) $O_{2}^{-}$

Choose the correct option:

1. (a), (d)

2. (b), (c)

3. (c), (d)

4. (b), (d)

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1.	\(\mathrm{O}^-_2>\mathrm{O}_2>\mathrm{O}^+_2\)	2.	\(\mathrm{O}^-_2<\mathrm{O}_2<\mathrm{O}^+_2\)
3.	\(\mathrm{O}^-_2>\mathrm{O}_2<\mathrm{O}^+_2\)	4.	\(\mathrm{O}^-_2<\mathrm{O}_2>\mathrm{O}^+_2\)

	Column I		Column II
A.	NO	1.	1.5
B.	CO	2.	2.0
C.	\(O_2^-\)	3.	2.5
D.	O₂	4.	3.0

1.	\(N^+_2\)	2.	\(O_2\)
3.	\(O^{2-}_2\)	4.	\(B_2\)

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