EMBRYOLOGY
RESPIRATORY SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Lighting match is a chemical change
|
|
X
|
|
|
✓
|
|
|
Either A or B
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -When a match stick is rubbed, friction raises the temperature above the ignition temperature, leading to the combustion of chemical at the tip of matchstick. Since combustion is a chemical reaction involving reaction with oxygen forming new products, burning of matchstick is a chemical change.
Detailed explanation-2: -A familiar example of a combustion reaction is a lighted match. When a match is struck, friction heats the head to a temperature at which the chemicals react and generate more heat than can escape into the air, and they burn with a flame.
Detailed explanation-3: -The process of burning (as opposed to evaporating) is a chemical reaction, a chemical change.
There is 1 question to complete.