Rajiv took three substances P, Q, and R and burnt them one by one. He noted down his observations given below. (I) Substance P burns quickly producing heat and light. (II) Substance Q burns in room temperature on its own. (III) Substance R burns with the evolution of heat, light, and sound. Which of the following statements regarding the given information is correct?    

Options

A. Substances P and Q are undergoing rapid combustion whereas R is undergoing explosion.
B. Substances P and R are undergoing spontaneous combustion whereas Q is undergoing rapid combustion.
C. Substance P is undergoing rapid combustion, Q is undergoing spontaneous combustion while R is undergoing explosion.
D. Substance P is undergoing spontaneous combustion, Q is undergoing rapid combustion while R is undergoing explosion.

Answer

C

Explanation

Substances which burn rapidly and produce heat and light are said to undergo rapid combustion. The substances that burn on their own at room temperature are said to undergo spontaneous combustion. The substances which burn with the evolution of heat, light, and sound are said to undergo explosion. The correct answer is C.