Choose the incorrect statemant.

Options

A. physical change in reversible
B. physical change results is formation of new substance
C. chemical change is permanent
D. physical change is accompanied by energy change

Answer

To solve the question of identifying the incorrect statement regarding physical and chemical changes, we will analyze each statement provided in the options.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Physical Change**: A change that affects one or more physical properties of a substance but does not alter its chemical composition. Examples include changes in state (solid, liquid, gas).
- **Chemical Change**: A change that results in the formation of new chemical substances. This change is often irreversible under normal conditions.

2. **Analyze Each Statement**:
- **Statement 1**: "Physical change is reversible."
- This is **correct**. Physical changes can often be reversed (e.g., melting and freezing of ice).

- **Statement 2**: "Physical change results in the formation of new substance."
- This is **incorrect**. Physical changes do not create new substances; they only change the state or appearance of the same substance.

- **Statement 3**: "Chemical change is permanent because it is irreversible."
- This is **correct**. Chemical changes typically result in new substances that cannot be easily reverted to their original forms.

- **Statement 4**: "Physical change is accompanied by energy change."
- This is **correct**. Physical changes can involve energy changes, such as heat being absorbed or released during phase changes.

3. **Identify the Incorrect Statement**:
- From the analysis, **Statement 2** is the incorrect statement because physical changes do not result in the formation of new substances.

### Final Answer:
The incorrect statement is: **"Physical change results in the formation of new substance."**

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