Question

I will class 8 chapter 4​

Answer 1

Answer:

1. match stick burns on rubbing because of friction.
2. we will roll blanket on that person or we use fire extinguisher

Answer 2

Answer:

1. When matchstick is rubbed against the side of the match box, some of the red phosphorus is converted into white phosphorus; this immediately react with potassium chlorate in the matchstick head to produce heat to ignite antinomy trisulphide and starts the combustion of matchstick.

2. Stop where you are, drop to the floor, roll slowly into the rug or blanket, cool off as soon as possible with water.

3. Nearly 85% of wild land fires in the United States are caused by humans. Humans-caused fires result from camp fires left unattended, the burning debris, equipment use malfunctions.

4. We see that a combustible substance cannot catch fire as long as its temperature is lower than its ignition temperature.

Explanation:

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