How many of the following terms are directly associated with Pb(lead)?(Pattinson process, Sindoor, Calcium plumbate, Cinnabar, Solder, Bronze, Wolframite, Liquation, Self reduction).

Answer

To determine how many of the given terms are directly associated with lead (Pb), we will analyze each term one by one.

1. **Pattinson Process**: This process is used to remove silver from lead. It is directly associated with lead.

2. **Sindoor**: Sindoor is known as red lead, which has the chemical formula Pb3O4. This term is directly associated with lead.

3. **Calcium Plumbate**: This compound has the formula Ca3PbO4. It is directly associated with lead.

4. **Cinnabar**: Cinnabar is the ore of mercury, with the formula HgS. It is not directly associated with lead.

5. **Solder**: Solder is an alloy that typically contains tin and lead. It is directly associated with lead.

6. **Bronze**: Bronze is an alloy of copper and tin. It does not contain lead and is not directly associated with lead.

7. **Wolframite**: Wolframite is an ore of tungsten, with the formula (Fe,Mn)WO4. It is not directly associated with lead.

8. **Liquation**: Liquation is a metallurgical process used for the purification of metals, including lead. It is directly associated with lead.

9. **Self Reduction**: This is a process in metallurgy where lead sulfide (PbS) undergoes self-reduction to produce lead metal. It is directly associated with lead.

Now, let's summarize the terms that are directly associated with lead:
- Pattinson Process
- Sindoor
- Calcium Plumbate
- Solder
- Liquation
- Self Reduction

Counting these, we find that there are **6 terms** directly associated with lead.

### Final Answer:
**6 terms are directly associated with lead (Pb).**