The crystal of KCl consists of

Options

A. KCI molecules
B. K and Cl atoms
C. K and CI lons
D. molecules, atoms and ions.

Explanation

To solve the question "The crystal of KCl consists of", we need to analyze the structure of potassium chloride (KCl) and understand the nature of its components.

### Step-by-Step Solution:

1. **Understanding KCl**:
- KCl is an ionic compound formed from potassium (K) and chlorine (Cl).
- In the solid state, KCl forms a crystal lattice structure.

**Hint**: Remember that ionic compounds are formed from the electrostatic attraction between positively and negatively charged ions.

2. **Dissociation of KCl**:
- When KCl is dissolved in water or when it is in its molten state, it dissociates into its constituent ions:
- Potassium ion (K⁺)
- Chloride ion (Cl⁻)

**Hint**: Think about how ionic compounds behave in solution or when melted; they break down into ions.

3. **Identifying the Components**:
- The question asks what the crystal of KCl consists of. Since KCl is composed of ions, we conclude that the crystal lattice is made up of K⁺ and Cl⁻ ions.

**Hint**: Focus on the charge of the particles; K⁺ is a cation (positively charged) and Cl⁻ is an anion (negatively charged).

4. **Evaluating the Options**:
- Option A: KCl molecule - Incorrect, as KCl does not exist as a discrete molecule in the solid state.
- Option B: KNCl atoms - Incorrect, as this does not represent the structure of KCl.
- Option C: K⁺ and Cl⁻ ions - Correct, as these are the actual components of the KCl crystal.
- Option D: Molecule, atom, and ions - Incorrect, as KCl specifically consists of ions.

**Hint**: Eliminate options that do not represent the ionic nature of KCl.

5. **Conclusion**:
- The correct answer is that the crystal of KCl consists of K⁺ and Cl⁻ ions.

### Final Answer:
The crystal of KCl consists of K⁺ and Cl⁻ ions.