Question

Give examples.
Q3. Give reasons:
(a) A piece of burning coal placed on an iron plate stops burning when covered with a glass jar.​

Answer 1

...When it will get covered by a glass jar oxygen supply will be cut - off . And combustion needs oxygen as a necessary . Hence it will stop burning in absence of oxygen .

Answer 2

Explanation:

because burning is done only by the application of oxygen and heat . if we cover the plate the oxygen supply is blocked hence the burning stops