Answer :

To determine whether chlorides are ionic or covalent, we will classify each chloride based on the nature of the elements involved.

1. KCl (Potassium Chloride):
- Potassium (K) is a metal.
- Chlorine (Cl) is a non-metal.
- Typically, when a metal and a non-metal combine, they form an ionic bond.
- Hence, KCl is ionic.

2. NCl (Nitrogen Chloride):
- Nitrogen (N) is a non-metal.
- Chlorine (Cl) is also a non-metal.
- Typically, when two non-metals combine, they form a covalent bond.
- Hence, NCl is covalent.

3. ICl (Iodine Chloride):
- Iodine (I) is a non-metal.
- Chlorine (Cl) is also a non-metal.
- Typically, when two non-metals combine, they form a covalent bond.
- Hence, ICl is covalent.

4. MgCl2 (Magnesium Chloride):
- Magnesium (Mg) is a metal.
- Chlorine (Cl) is a non-metal.
- Typically, when a metal and a non-metal combine, they form an ionic bond.
- Hence, MgCl2 is ionic.

5. PCl5 (Phosphorus Pentachloride):
- Phosphorus (P) is a non-metal.
- Chlorine (Cl) is also a non-metal.
- Typically, when two non-metals combine, they form a covalent bond.
- Hence, PCl5 is covalent.

6. CCl4 (Carbon Tetrachloride):
- Carbon (C) is a non-metal.
- Chlorine (Cl) is also a non-metal.
- Typically, when two non-metals combine, they form a covalent bond.
- Hence, CCl4 is covalent.

Based on this analysis, we can categorize the chlorides as follows:
- KCl: 1 (ionic)
- NCl: C (covalent)
- ICl: C (covalent)
- MgCl2: 1 (ionic)
- PCl5: C (covalent)
- CCl4: C (covalent)

Putting it all together, we get:
```
{
'KCl': 1,
'NCl': 'C',
'ICl': 'C',
'MgCl2': 1,
'PCl5': 'C',
'CCl4': 'C'
}
```