Question

The ignition temperature of fuel A, B, C and D are given below.$$\begin{array}{cc}\text{Fuel}& \text{Ignition Temperature}\\ \text{A}& 5^{\circ }\text{C}\\ \text{B}& {17}^{\circ }\text{C}\\ \text{C}& {480}^{\circ }\text{C}\\ \text{D}& {60}^{\circ }\text{C}\end{array}$$Which of the following will undergo spontaneous combustion at room temperature?

• A. Fuel A and B
• B. Fuel B and C
• C. Fuel C and D
• D. Fuel A and D

Answer 1

The correct option is A Fuel A and B

Spontaneous combustion is the combustion in which no external agent is required to start the reaction.
The ignition temperature of fuel A and B are lower than room temperature. Thus, they will start burning spontaneously at room temperature. Whereas the ignition temperature of fuel C and D are higher than room temperature. So they would not undergo spontaneous combustion.