_______ is the branch of chemistry which deals with the treatment of diseases using chemicals

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a specific branch of chemistry that focuses on the treatment of diseases using chemicals.

2. **Identifying Relevant Terms**: The key terms in the question are "branch of chemistry," "treatment," "diseases," and "chemicals."

3. **Recalling Relevant Knowledge**: In chemistry, there are various branches such as organic chemistry, inorganic chemistry, physical chemistry, and medicinal chemistry. Among these, we need to find the one that specifically relates to disease treatment.

4. **Defining the Correct Branch**: The branch of chemistry that deals with the treatment of diseases using chemicals is known as "Chemotherapy."

5. **Final Answer**: Therefore, the answer to the question is "Chemotherapy."

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