Q57 of 87 Page 107

One of the following is not a combustible substance. This one is:

Asbestos is a non combustible substance and cannot catch fire on its own.

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Explain how, burning if fuels such as coal, petrol and diesel leads to acid rain. How is acid rain harmful?

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Which of the following substance has the lowest ignition temperature?

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Which of the following is not used in making matchsticks these days?

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Which of the following undergoes spontaneous combustion?