How many of these properties are intensive here Temperature, Refractive index, density, enthalpy, entropy, molar heat capacity, Gibb's free energy, pH.

Answer

To determine how many of the given properties are intensive, we need to understand the definitions of intensive and extensive properties:

1. **Intensive Properties**: These properties do not depend on the amount of matter present in a system. Examples include temperature, density, refractive index, and pH.

2. **Extensive Properties**: These properties do depend on the amount of matter in a system. Examples include mass, volume, enthalpy, entropy, and Gibb's free energy.

Now, let's analyze each property mentioned in the question:

1. **Temperature**: Intensive property (independent of the amount of matter).
2. **Refractive Index**: Intensive property (independent of the amount of matter).
3. **Density**: Intensive property (independent of the amount of matter).
4. **Enthalpy**: Extensive property (depends on the amount of matter).
5. **Entropy**: Extensive property (depends on the amount of matter).
6. **Molar Heat Capacity**: Intensive property (independent of the amount of matter).
7. **Gibb's Free Energy**: Extensive property (depends on the amount of matter).
8. **pH**: Intensive property (independent of the amount of matter).

Now, let's count the intensive properties:

- Temperature: Intensive
- Refractive Index: Intensive
- Density: Intensive
- Molar Heat Capacity: Intensive
- pH: Intensive

Thus, the intensive properties are: Temperature, Refractive Index, Density, Molar Heat Capacity, and pH.

**Total Intensive Properties = 5**

### Final Answer:
There are **5 intensive properties** among the given options.