Question

Bonding in this molecule can be understood to involve a coordinate bond.

• A. Carbon tetrachloride.
• B. Hydrogen
• C. Hydrogen chloride
• D. Ammonium chloride

Answer 1

The correct option is D

Ammonium chloride

Part 1: Explanation For the correct answer.

Option D: Ammonium Chloride $\mathbf{\left(}{\mathbf{NH}}_{\mathbf{4}}\mathbf{Cl}\mathbf{\right)}$

1. It is formed when a positively charged ammonium ion $\left({\mathrm{NH}}_4^{+}\right)$ comes in contact with the negatively charged chloride ion ${\mathrm{Cl}}^{-}$, forming an ionic bond.
2. The ammonium ion is formed when a lone pair of ammonia $\left(\underset{ }{\overset{\circ \circ }{N}}{H}_3\right)$ is shared with ${\mathrm{H}}^{+}$ ion forming a coordinate bond.

Part 2: Explanation of incorrect option:

Option A: Carbon tetrachloride

1. It is formed when $4$ valence electron of $\mathrm{C}$ is shared with the Chloride$\left(\mathrm{Cl}\right)$ atom forming a covalent bond.

Option B: Hydrogen $\left({\mathrm{H}}_2\right)$

1. The bond formed by sharing electrons of the same element is always a covalent bond.

Option C: Hydrogen Chloride $\mathbf{\left(}\mathbf{HCl}\mathbf{\right)}$

1. It is formed when $1$ electron of $\mathrm{H}$is shared with the $1$Chloride$\left(\mathrm{Cl}\right)$ atom forming a covalent bond.

So, Option D is correct. Ammonium chloride $\left({\mathrm{NH}}_4\mathrm{Cl}\right)$ has a coordinate bond in the given compounds.