Question 38

Complete the crossword Fig. 6.1 with the help of the clues : Fig. 6.1 36 E XEMPLAR PROBLEMS Across Down 1. Non-metal which catches 2. A chemical process in which fire if exposed to air (10) a substance reacts with oxygen to give off heat. (10) 3. The lowest temperature at 4. Petrol is used as a __________ which a substance catches in automobiles. (4) fire is called its __________ temperature. (8) 5. The most common fire 6. It is as hard as stone and extinguisher. (5) black in colour. (4)

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