Question

The linear structure is assumed by__?

• A. ${\mathrm{SnCl}}_2$
• B. ${\mathrm{NCO}}^{-}$
• C. ${\mathrm{NO}}_2^{+}$
• D. ${\mathrm{CS}}_2$

Answer 1

Answer: (B), (C), (D)

${\mathrm{CS}}_2$

Explanation for correct option

(B),(C), (D)

Hybridization:

• “Hybridization is defined as the process of intermixing of the orbitals of slightly different energies so as to redistribute their energies, resulting in the formation of a new set of orbitals of equivalent energies and shape.”
• sp hybridization gives linear structure whereas sp² gives trigonal planar structure. sp³ gives tetrahedral structure, etc.
• If the bond angle in a molecule is $180$ degrees then the molecule is said to have a linear structure. The bond may be single or double. The central item bonds to two other atoms either by a single or double bond.
• ${\mathrm{NCO}}^{-}$:-The structure of ${\mathrm{NCO}}^{-}$ is also linear. The hybridization is $sp$.

• ${\mathrm{NO}}_2^{+}$: Nitrogen dioxide $\left({\mathrm{NO}}_2\right)$ has angular bonding but when it loses one electron the ion (${\mathrm{NO}}_2^{+}$) gets a linear structure. The hybridization is $sp$

• Carbon disulfide has a central carbon atom bonded with two sulfur atoms at the bond angle of ${180}^{\circ }$, making the molecular geometry linear. The hybridization is $sp$.

Explanation for incorrect option

• ${\mathrm{SnCl}}_2$- Stannous chloride has one lone pair and two sigma bonds, its hybridization is $s{p}^2$, and hence it has an angular or bent structure.

Hence, options (B), (C), and (D) are correct. The linear structure is assumed by ${\mathrm{NCO}}^{-}$,${\mathrm{CS}}_2$, and ${\mathrm{NO}}_2^{+}$.