1. Which of the following is a hydrocarbon fuel?
A) Hydrogen peroxide
B) Methane
C) Ammonia
D) Sodium chloride
Answer: B) Methane
2. What type of reaction is combustion?
A) Acid-base reaction
B) Oxidation-reduction reaction
C) Precipitation reaction
D) Decomposition reaction
Answer: B) Oxidation-reduction reaction
3. Which of the following is a non-renewable fuel?
A) Wood
B) Natural gas
C) Solar energy
D) Wind energy
Answer: B) Natural gas
4. Which gas is mainly responsible for greenhouse effect during incomplete combustion of fuels?
A) Carbon dioxide
B) Carbon monoxide
C) Oxygen
D) Nitrogen
Answer: B) Carbon monoxide
5. The calorific value of a fuel indicates:
A) Its density
B) Amount of heat released on complete combustion
C) Its melting point
D) Its viscosity
Answer: B) Amount of heat released on complete combustion
6. Which of the following is a liquid fuel?
A) Coal
B) Petroleum
C) Methane
D) Hydrogen
Answer: B) Petroleum
7. What is the main component of natural gas?
A) Ethane
B) Methane
C) Propane
D) Butane
Answer: B) Methane
8. Which of the following fuels releases the highest energy per kg?
A) Coal
B) LPG
C) Petrol
D) Hydrogen
Answer: D) Hydrogen
9. Which of the following is a solid fossil fuel?
A) Methane
B) Coal
C) Petrol
D) LPG
Answer: B) Coal
10. The soot formed during incomplete combustion is primarily composed of:
A) Carbon
B) Hydrogen
C) Oxygen
D) Nitrogen
Answer: A) Carbon
11. Which of the following is a cleanest burning fuel?
A) Coal
B) Petrol
C) Hydrogen
D) Kerosene
Answer: C) Hydrogen
12. Which product is formed during complete combustion of methane?
A) CO + H2O
B) CO2 + H2O
C) C + H2O
D) CH4O
Answer: B) CO2 + H2O
13. Which of the following fuels is used in rocket propulsion?
A) Coal
B) Petrol
C) Liquid hydrogen
D) Wood
Answer: C) Liquid hydrogen
14. Octane number of petrol indicates:
A) Boiling point
B) Flash point
C) Anti-knocking property
D) Density
Answer: C) Anti-knocking property
15. During combustion, LPG mainly produces:
A) CO + H2O
B) CO2 + H2O
C) CO2 only
D) H2 only
Answer: B) CO2 + H2O
16. Which of the following is an example of biofuel?
A) Methane
B) Ethanol
C) Coal
D) Kerosene
Answer: B) Ethanol
17. Which of the following is a non-conventional fuel?
A) LPG
B) Petrol
C) Solar fuel
D) Diesel
Answer: C) Solar fuel
18. What is the main disadvantage of coal as a fuel?
A) Low calorific value
B) Production of smoke and ash
C) Burns without flame
D) Too light
Answer: B) Production of smoke and ash
19. Which of the following is a gaseous fossil fuel?
A) Coal
B) Natural gas
C) Petrol
D) Diesel
Answer: B) Natural gas
20. What is the main constituent of LPG?
A) Methane and ethane
B) Propane and butane
C) Octane and hexane
D) Hydrogen and oxygen
Answer: B) Propane and butane
21. Incomplete combustion of hydrocarbons produces:
A) CO2 only
B) CO + soot + H2O
C) H2O only
D) CO2 + H2 only
Answer: B) CO + soot + H2O
22. Which fuel is commonly used in diesel engines?
A) Petrol
B) Kerosene
C) Diesel
D) LPG
Answer: C) Diesel
23. Which of the following has the highest calorific value?
A) Wood
B) Coal
C) Petrol
D) LPG
Answer: D) LPG
24. The smokeless fuel used for domestic purposes is:
A) Coal
B) CNG
C) Wood
D) Kerosene
Answer: B) CNG
25. The process of extracting fuel from petroleum is called:
A) Cracking
B) Fractional distillation
C) Polymerization
D) Hydrogenation
Answer: B) Fractional distillation
26. Which of the following fuels is least polluting?
A) Coal
B) Petrol
C) Hydrogen
D) Diesel
Answer: C) Hydrogen
27. Which fuel is mainly used in jet engines?
A) Diesel
B) Petrol
C) Kerosene
D) LPG
Answer: C) Kerosene
28. Combustion of hydrocarbon fuels requires:
A) Nitrogen only
B) Oxygen only
C) Oxygen and heat
D) Carbon dioxide only
Answer: C) Oxygen and heat
29. Which of the following is flammable at room temperature?
A) Water
B) Ethanol
C) Sodium hydroxide
D) Calcium carbonate
Answer: B) Ethanol
30. The term “fossil fuel” refers to fuels derived from:
A) Plants only
B) Animals only
C) Ancient plants and animals
D) Minerals
Answer: C) Ancient plants and animals