A change in which one or more new substances are formed is called a ________ change.

Options

A. Physical
B. Chemical
C. Both A and B.
D. None of the above.

Answer

To solve the question, we need to identify the type of change described. The question states: "A change in which one or more new substances are formed is called a ________ change."

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking for a term that describes a change where new substances are formed.

2. **Identifying the Options**: The options provided are:
- Physical change
- Chemical change
- Both A and B are wrong
- None of the above

3. **Analyzing the First Option (Physical Change)**:
- In a physical change, the substance may change its form (like melting or freezing), but no new substances are formed.
- Example: Ice melting into water is a physical change; the substance (H2O) remains the same.

4. **Analyzing the Second Option (Chemical Change)**:
- In a chemical change, one or more new substances are formed.
- Example: When iron rusts, it reacts with oxygen to form iron oxide, which is a new substance.

5. **Conclusion**: Since the question specifies that new substances are formed, the correct answer must be "Chemical change."

### Final Answer:
A change in which one or more new substances are formed is called a **chemical change**.

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