Question

plz answer ,my question i will mark as brainliest

1. Which substance gives heat and light after combustion?
a. Flame b. Fuel c. Combustion d. None of these
2. The substances which have very low ignition temperature will
a. Catch fire easily b. Will not catch fire
c. Catch fire after some time d. None of these
3. CNG and LPG are the examples of
a. Solid fuels b. Liquid fuels
c. Gaseous fuels d. They are not fuels
4. Like fuel the sun also provides heat and light. The process taking place in the sun is
called
a. Combustion b. Nuclear process c. Burning d. All of these
5. Coal burns with
a. Flame b. Only glow c. Both flame and glow d. None of these
6. Combustion is a
a. Chemical process b. Physical process
c. Both a & b d. None of these
7. Ignition temperature is
a. Lowest temperature at which fire catches
b. Highest temperature at which fire catches
c. Any temperature
d. Medium temperature
8. The product of combustion are
a. Carbon-di-oxide and water b. Oxygen c. Nitrogen d. Water
9. The gas which is a supporter of combustion
a. Oxygen b. Hydrogen c. Carbon-di-oxide d. Nitrogen-di-oxide
10. Which of the following is a combustible substance?
a. Iron rod b. Wood c. Glass d. All of these

Answer 1

Answer:

1.a

2.c

3.b

4.b

5.c

6.a

7.b

8.a

9.c

10.c

Answer 2

1) Fuel

2) Catch fire easily

3) Gaseous fuels

4) All of these

5) Flame

6) Chemical change

7) Lowest temperature at which fire catches.

8) Carbon dioxide and water.

9) Oxygen

10) wood