Complete the crossword with the help of the clues.

Across
1. Non-metal which catches fire if exposed to air. (10)
3. The lowest temperature at which a substance catches fire is called its …………. temperature. (8)
5. The most common fire extinguisher. (5)
Down
2. A chemical process in which a substance reacts with oxygen to give off heat. (10)
4. Petrol is used as a ………….. in automobiles. (4)
6. It is as hard as stone and black in colour. (4)"

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Updated on: 10-Oct-2022

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