Answer the following questilns written above .
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Answers
Explanation:
1. The petrol will catch fire first because it is more volatile compared to wood.
2. Please prefer the attachment.
3. Amoeba is an unicellular organism whereas earthworm is multicellular organisms.(Please prefer the second attachment.)
4. The amount of energy produced by the complete combustion of material or fuel. Measured in units of energy per amount of material eg. Kj/Kg. When the calorific value of fuel is increased its efficiency goes up.
5. Advantages of gaseous fuels are:
i. Least amount of handling.
ii. Calorific value is high.
iii. Do not produce any smoke or ash.
iv. Burning can be easily controlled.
v. Can be transported through pipeline to the place of use.
6. Please prefer the third attachment.
7. Mitochondria are known as power house of the cell because it is responsible for the realising of energy from food i.e. Cellular respiration.
8. Calorific value of fuel= Kj/Kg
= 300000/10
= 30000 Kj/Kg.
9. Burning hydro carbon produce carbon dioxide. Incomplete combustion creates poisonous carbon monoxide. Some of the products from burning fuels dissolved in rain water to form acid rain.
10. Please prefer the fourth attachment.
Hope it'll help you.....
