MCQ
For a spontaneous combustion to take place, which condition given below is necessary?
  • A
    Flame.
  • Low ignition temperature.
  • C
    Rise in temperature.
  • D
    Temperature below $30^\circ C$.

Answer

Correct option: B.
Low ignition temperature.

For spontaneous combustion to take place, a substance should have low ignition temperature: e.g., The ignition temperature of phosphorus is $35^\circ\ C$.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The most reactive metal is:
Payel is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Payel wants to take help from you:
Which of the following sound frequencies can be heard by a woman having a normal hearing range?
$A. 25000Hz.$
$B. 15kHz.$
$C. 40000Hz.$
$D. 25Hz.$
The primary function of the crystalline lens in the human eye is to.
Which of the following has the highest calorific value?
Some mustard oil is kept in a beaker. It will exert pressure:
The place inside the earth's crust where the earthquake is generated is called:
Arrange the given metals in the descending order of their reactivity.
In the diagram, the coin is just out of sight. If water is poured into the metal can, the coin will.
Amit was travelling in a taxi when he saw lightning at some distance. He heard a loud thunder after a few seconds.
(i) What should Amit do immediately to remain safe?
(a) Increase the speed of the car
(b) Stop the car and remain seated inside
(c) Stop the car and take shelter inside a building
(d) Turn the car and travel in the opposite direction
(ii) Which of these conditions results in lightning?
(a) Negative and positive charges meeting
(b) The number of negative charges increasing
(c) The number of positive charges increasing
(d) Negative and positive charges moving away from each other.
(iii) A lightning conductor protects a building from lightning. What is a lightning conductor made of?
(a) Glass
(b) Metal
(c) Wood
(d) Plastic