Question

1. Rani took three substances P, Q, and R, and burnt them one by one. He noted down his
observations given below. I. Substance P bums quickly producing heat and light. II.
Substance Q bums at room temperature on its own. III. Substance R bums with the
evolution of heat, light, and sound. Which of the following statements regarding the given
information is correct?
a) Substances P and Q are undergoing rapid combustion whereas R is undergoing an
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 an explosion.
d) Substance P is undergoing spontaneous combustion, Q is undergoing rapid combustion
while R is undergoing an explosion.

Answer 1

Answer:

d........is the riight ans