Question

Q2) Look at the diagram and answer the questions that follow

1) In which case candle will burn smoothly and why?

2) What will happen if a glass chimney is placed above the candle in figure (ii)?

3) Write your observation in case (iii)

4) Which condition necessary for combustion is depicted in the diagram?​

Answer 1

Explanation:

(1) The candle will burn most smoothly in the presence of oxygen as it is necessary for burning and combustion.

(2) It's flames will bece weak as the supply of oxygen is weak and oxygen is not coming properly.

(3) The candle will stop burning as the it is covered from all the sides it's oxygen supply is cut and hence, it will stop burning.

(4) The necessary conditions for combustion are :

• Low ignition temperature
• Supply of oxygen
• Combustible material