Question

which of the following is an example of spontaneous reaction
1 coal dust near the coal mines
2 lighting up of LPG gas stove in the kitchen
3 burning of fire crackers
4 all of these
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Answer 1

Answer:

4

Explanation:

When a radioactive atom splits up, it releases energy

Answer 2

Answer:

1 coal dust near the coal mines is the right answer I hope it is help you you confused I know so I explain