State whether the following statements are true or false: When petrol is burnt, flames are produced. This is an endothermic reaction.

Explanation

To determine whether the statements are true or false, we will analyze each part of the question step by step.

### Step 1: Analyze the first statement
**Statement:** "When petrol is burnt, flames are produced."

- When petrol is burned, it undergoes a combustion reaction. During this process, petrol reacts with oxygen in the air, producing heat and light, which we observe as flames.
- Therefore, this statement is **True**.

### Step 2: Analyze the second statement
**Statement:** "This is an endothermic reaction."

- An endothermic reaction is one in which heat is absorbed from the surroundings. In contrast, a combustion reaction, such as burning petrol, releases heat into the surroundings.
- Since burning petrol releases heat, it is classified as an **exothermic reaction**.
- Therefore, this statement is **False**.

### Conclusion
- The first statement is **True**.
- The second statement is **False**.

### Final Answer:
1. True
2. False

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