Multiple Choice

Which of the following molecules is expected to exhibit diamagnetic behaviour?

A$$N_{2}$$
Correct Answer
B$$O_{2}$$
C$$S_{2}$$
D$$C_{2}$$
Correct Answer

Solution

$$\displaystyle N_2$$ and $$\displaystyle C_2$$ molecules are diamagnetic as all electrons are paired.
$$\displaystyle O_2$$ and $$\displaystyle S_2$$ molecules are paramagnetic as they contain unpaired electrons.

The $$MO$$ configuration of molecules are shown below.
$$\displaystyle N_2 \: KK \: (\sigma \: 2s)^2 \: (\sigma ^* \: 2s)^2 \: (\sigma \: 2px)^2 \: (\pi \: 2py)^2 \: (\pi \: 2pz)^2$$

$$\displaystyle O_2 \: KK \: (\sigma \: 2s)^2 \: (\sigma ^* \: 2s)^2 \: (\sigma \: 2px)^2 \: (\pi \: 2py)^2 \: (\pi \: 2pz)^2 \: (\pi ^* \: 2py)^1 \: (\pi ^* \: 2pz)^1$$

$$\displaystyle S_2 \: LL \: (\sigma \: 3s)^2 \: (\sigma ^* \: 3s)^2 \: (\sigma \: 3px)^2 \: (\pi \: 3py)^2 \: (\pi \: 3pz)^2 \: (\pi ^* \: 3py)^1 \: (\pi ^* \: 3pz)^1$$

$$\displaystyle C_2 \: KK \: (\sigma \: 2s)^2 \: (\sigma ^* \: 2s)^2 \: (\pi \: 2py)^2 \: (\pi \: 2pz)^2$$

SIMILAR QUESTIONS

Chemical Bonding

The most electronegative element is:

Chemical Bonding

The number of antibonding electron pairs in $$O^{2-}_{2}$$ molecular ion on the basis of molecular orbital theory is :

Chemical Bonding

Which of the following species are paramagnetic?

Chemical Bonding

Among $$KO_2, AlO_2^-, BaO_2, and NO_2^+$$, unpaired electron is present in:

Chemical Bonding

The total number of bonding and antibonding electrons in $$\displaystyle O{_{2}}^{+}$$ are respectively. (If the answer is 14 and 7, then represent as 0147):

Chemical Bonding

State True or False. $$O_2, O_2^-$$ and $$O_2^{2-}$$ are paramagnetic species.

Chemical Bonding

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description ?

Chemical Bonding

Which of the following is paramagnetic?

Chemical Bonding

During change of $${O}_{2}$$ to $${O}_{2}^{-}$$ ion, the electron adds on which one of the following orbitals?

Chemical Bonding

When $$O_2$$ is absorbed on a metallic surface, electron transfer occurs from the metal to $$O_2$$. The true statement(s) regarding this adsorption is(are):

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