Question

Rajiv took three substances P,Q,R and burnt them one by one. He noted down his observation as follows. 1.Substance P burns quickly producing heat and light. 2. Substance Q burns at room temperature at its own 3. Substance R burns with the evolution of heat, light and sound .Which of the following is the correct statements regarding
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Answer 1

Answer:

The answer is C

Explanation: It is example of spontaneous combustion ,,