Question

Three substances P, Q, and R are burnt and the following observations are made:
1. P burns quickly and produces heat and light.
2. Q burns on its own at room temperature.
3. R burns with heat and light and produces a loud sound. It also liberates a huge amount of gases while burning.

What type of combustion do P, Q, and R undergo?

• A. P: Spontaneous combustion
  Q: Spontaneous combustion
  R: Explosion
• B. P: Rapid combustion
  Q: Spontaneous combustion
  R: Rapid combustion
• C. P: Rapid combustion
  Q: Spontaneous combustion
  R: Explosion
• D. P: Spontaneous combustion
  Q: Rapid combustion
  R: Explosion

Answer 1

The correct option is C P: Rapid combustion

Q: Spontaneous combustion
R: Explosion