Bond Order by MOT

Q. Consider the following species:
$C{N}^{+}$, $C{N}^{–}$, $NO$ and $CN$
Which one of these will have the highest bond order?

1. $C{N}^{+}$
2. $C{N}^{–}$
3. $NO$
4. $CN$

Q. A simplified application of the molecular orbital theory to the hypothetical molecule $\text{'OF'}$, would give its bond order as:

1. 2
2. 1.5
3. 1
4. 0.5

Q. How many species are dimagnetic and have their bond order greater than 2.5?
$N_2,N_2^{\oplus },N{O}^{\oplus },N{O}^{\ominus },CO,C{N}^{\ominus },K{O}_2,N{a}_2{O}_2$

Q.

The species having bond order different from that in CO is:

1. NO^-

2. NO⁺

3. CN^-

4. N₂

Q. Which one of the following pairs of species have the same bond order?

1. $O_2$, ${NO}^{+}$
2. ${CN}^{-}$, $CO$
3. $N_2$, ${O_2}^{-}$
4. $CO$, $NO$

Q. Which of the following facts regarding change in bond length is correct?

1. Increases in going from $N_2$ to $N_2^{+}$, decreases in going from $O_2$ to $O_2^{+}$
2. Decreases in going from $N_2$ to $N_2^{+}$, decreases in going from $O_2$ to $O_2^{+}$
3. Increases in going from $N_2$ to $N_2^{+}$ and $O_2$ to $O_2^{+}$
4. Decreases in going from $N_2$ to $N_2^{+}$ and $O_2$ to $O_2^{+}$

Q. If number of Bonding electrons = 10 and number of anti-bonding electrons = 8, the bond order for the corresponding molecule is ​​​​​​​.

1. 1
2. 2
3. 3

Q.

Let the bond order of ${O_2}^{2-}$ be X and that of $CO$ be Y. Then the value of XY is _____?

1. 2

2. 6

3. 3

4. 4

Q. Select the correct order:

1. Bond strength : $N{O}^{-}<NO<N{O}^{+}$
2. $N-O$ bond angle : $N{O}_2^{+}<N{O}_2^{-}<N{O}_3^{-}$
3. Thermal stability : $LiF>NaF>KF>RbF>CsF$
4. Hydrated size : $B{e}^{2+}\left(aq\right)<M{g}^{2+}\left(aq\right)<C{a}^{2+}\left(aq\right)<S{r}^{2+}\left(aq\right)<B{a}^{2+}\left(aq\right)$

Q. The correct bond order in the following species is :

1. $O_2^{-}<O_2^{+}<O_2^{2+}$
2. $O_2^{2+}<O_2^{+}<O_2^{-}$
3. $O_2^{2+}<O_2^{-}<O_2^{+}$

4. $O_2^{+}<O_2^{-}<O_2^{2+}$

Q. Which of the following facts regarding change in bond length is correct?

1. Increases in going from $N_2$ to $N_2^{+}$, decreases in going from $O_2$ to $O_2^{+}$
2. Decreases in going from $N_2$ to $N_2^{+}$, decreases in going from $O_2$ to $O_2^{+}$
3. Increases in going from $N_2$ to $N_2^{+}$ and $O_2$ to $O_2^{+}$
4. Decreases in going from $N_2$ to $N_2^{+}$ and $O_2$ to $O_2^{+}$

Q. The bond order is maximum in:

1. $O_2$
2. $O_2^{-}$
3. $O_2^{+}$
4. $O_2^{2-}$

Q. Which of the following pairs of species have the same bond order?

1. $CO,NO$
2. $O_2,N{O}^{+}$
3. $C{N}^{-},CO$
4. $N_2,O_2^{-}$