Question 21.Assertion (A): A matchstick catch fire when rubbed on the rough surface of the match box. Reason (R):Due to friction between the stick and rough surface a matchstick catches fire.
In the following questions a statement of assertion (A) followed by a statement of reasons (R) is given ,choose the correct option out of the choices given below in each question.
(a) If Both A and R are true and R is the correct explanation of A. (b) If Both A and R are true but R is not the correct explanation of A. (c) If A is true but R is false. (d) If A is false but R is true.
Answers
Answered by
0
Answer:
Explanation:
On rubbing the match stick in the rough surface, the friction converts this work into heat. The heat raises the temperature of the chemical present on the match stick head to its ignition temperature. Due to this the chemical substance catches fire and the match stick starts burning.
Similar questions