Question

(A) Fill in the blanks:
1. Aliquid fuel, used in homes is....
2. Rapid combustion is also called....
3. For combustion to take place, both a..........substance and a........ . of combustion must be present.
4. Fire produced by oil cannot be controlled by.......
5. Fuel must be heated to its.........
before it catches fire.
6. The........zone of the candle flame is hottest.
7. A blue flame is a.......
flame.
8. A good fuel should have........
-ignition temperature.
9. The amount of heat evolved when one gram of fuel is completely burnt is called.....
10. Carbon monoxide is.........
poisonous than carbon dioxide.
(B) Write 'T' for true and 'F'for false statements:
1. Burning of fuels in the presence of oxygen releases energy.
2. The substance having higher ignition temperature catches fire easily.
3. Aflame becomes yellow/luminous due to the burning of carbon particles.
4. Inflammable substances have high ignition temperature.
5. Carbon dioxide is a supporter of combustion.
6. Hydrogen has the lowest calorific value among all the fuels.
7. Gaseous fuels do not leave any ash after burning.
8. When coal is burnt in insufficient oxygen, it produces carbon monoxide.​

Answer 1

Answer:

lpg

Explanation:

we use it for cooking