A mixture of ammonium chloride and sand is separated by

Options

A. Evaporation
B. Decantation
C. Filtration
D. Sublimation

Answer

To separate a mixture of ammonium chloride and sand, we can use the process of sublimation. Here’s a step-by-step explanation of how this works:

### Step-by-Step Solution:

1. **Understanding the Mixture**:
- We have a mixture of two substances: ammonium chloride (a solid) and sand (also a solid).

2. **Identifying Properties**:
- Ammonium chloride can undergo sublimation, meaning it can change directly from a solid to a gas without passing through a liquid state when heated.
- Sand does not sublime; it remains solid when heated.

3. **Heating the Mixture**:
- When we heat the mixture of ammonium chloride and sand, the ammonium chloride will begin to sublime. This means it will turn into vapor (gas) as it is heated.

4. **Collecting the Gas**:
- The vapor of ammonium chloride can be collected by cooling it down. When the vapor cools, it will condense back into solid ammonium chloride.

5. **Separation of Components**:
- After the heating and cooling process, we will have solid ammonium chloride collected separately from the sand, which remains in its original solid form.

6. **Final Result**:
- The result of this process is that we have successfully separated ammonium chloride from sand using sublimation.