Coordinate bonding is involved in which of the following molecule? Carbon tetrachloride Ammonium chloride Hydrogen Hydrogen

Options

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

Explanation

To determine which molecule involves coordinate bonding, we will analyze each of the given options step by step.

### Step 1: Analyze Carbon Tetrachloride (CCl₄)
- **Structure**: Carbon tetrachloride has the formula CCl₄.
- **Bonding**: In this molecule, carbon forms four covalent bonds with four chlorine atoms.
- **Conclusion**: There are no coordinate bonds in CCl₄; all bonds are covalent.

### Step 2: Analyze Ammonium Chloride (NH₄Cl)
- **Structure**: Ammonium chloride has the formula NH₄Cl.
- **Bonding**: In NH₄Cl, the ammonium ion (NH₄⁺) is formed when ammonia (NH₃) donates a pair of electrons to a hydrogen ion (H⁺), resulting in a coordinate bond (also known as a dative bond).
- **Ionic Bond**: Additionally, NH₄Cl contains an ionic bond between the NH₄⁺ ion and the chloride ion (Cl⁻).
- **Conclusion**: NH₄Cl contains a coordinate bond as well as covalent and ionic bonds.

### Step 3: Analyze Hydrogen (H₂)
- **Structure**: The hydrogen molecule has the formula H₂.
- **Bonding**: In H₂, two hydrogen atoms share a pair of electrons, forming a covalent bond.
- **Conclusion**: There are no coordinate bonds in H₂; it only has covalent bonds.

### Final Conclusion
Among the given options, **Ammonium Chloride (NH₄Cl)** is the molecule that involves coordinate bonding.

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