Fuels

This Sample Paper Based on CBSE Science & Technology Class X Syllabus

1. The amount of charcoal obtained from 1Kg of wood by destructive distillation is approx.
a. 500gm
b. 750gm
c. 400gm
d. 250 gm

2. The percentage of methane in biogas is approx.
a. 35%
b. 40%
c. 30%
d. 65%

3. Which of the following forms of coal has maximum percentage of carbon.
a. bituminous
b. peat
c. anthracite
d. liquite

4. Coal gas is a mixture of
a. carbon dioxide, hydrogen and methane
b. hydrogen, butane and carbondioxide
c. methane, hydrogen and carbonmonoxide
d. none of the above.

5. The calorific value of LPG is about
a. 30 KJ/g
b. 50 KJ/g
c. 80 KJ/g
d. none of these

6. The main constituent of LPG is
a. methane
b. butane
c. propane
d. none of these

7. Natural gas mainly consist of
a. methane
b. butane
c. propane
d. ethane

8. Which of the following is not a processed fuel
a. charcoal
b. petrol
c. coal
d. coalgas

9. Which of the following is a secondary fuel
a. wood
b. natural gas
c. petroleum
d. coal gas

10. Which of the following fuels has the highest calorific value.
a. biogas
b. coal
c. L.P.G
d. wood

11. Which of the following fuels has the least calorific value.
a. hydrogen
b. biogas
c. kerosene
d. dung cakes

12. Which of the following compound liberates maximum heat when it undergoes combustion.
a. hydrogen
b. butane
c. ethane
d. methane

13. The fractional distillition of coal tar yields
a. benzene
b. carbon monoxide
c. carbon tetrachloride
d. none of the above

14. One of the following is not obtained on fractional distillation of petroleum.
a. paraffin wax
b. asphalt
c. coal gas
d. petrol

15. In Chulhas gaps are left between the logs
a. to cut off the supply of air
b. to make space for the collection of ash
c. to allow air and facilitate fuel burning
d. none of the above

16. Kerosene burns more rapidly than coke because
a. it has got more oxygen in it than coke
b. its ignition temperature is low
c. none of the above
d. all of the above

17. Which of the following flame is produced by a candle
a. blue flame
b. yellow luminous flame
c. non luminous flame
d. none of he above

18. Bio-gas is a mixture of
a. CO2+H2+CH4
b. CO2+SO2+CH4
c. CO2+CH4+H2+H2S
d. None of the above

19. Charcoal is mainly
a. carbon and graphite
b. carbon
c. carbon and silica
d. graphite

20. Bagasse is nothing but
a. wet wood when dried and chopped.
b. sugarcane from which juice has been extracted.
c. wheat chaff.
d. none of the above.

21. Which of the following has the highest calorific value
a. oxygen
b. hydrogen
c. charcoal
d. methane

22. We can boil water in a paper cup without burning it because
a. the water soaks the paper and hence the paper does not burn.
b. paper has a higher equilibrium temp.
c. the heat given by the flame is quickly transferred from the boiling water ,preventing the paper from heating up to its ignition temp.
d. none of the above.

23. A piece of cloth soaked in a mixture of alcohol & water when brought in contact with a match stick catches fire immediately but extinguishes without burning the cloth, because
a. the smoke produced during burning extinguishes burning.
b. alcohol burns of quickly and the presence of water does not allow the reaching of ignition temperature of cloth.
c. none of the above
d. all of the above.

24. Logs of wood can be set to fire quickly by pouring kerosene or oil on it and then bringing a flame to it. Because
a. kerosene has a lower ignition temperature and burns quickly and heat produced due to this is enough to reach the ignition temperature of wood.
b. kerosene on burning liberates oxygen. Which is essential for the burning and thus helps in acheiving the ignition temperature of wood.
c. none of the above
d. all the above

25. Which of the following liberates maximum heat
a. methane
b. butane
c. propane
d. ethane

26. Which of the following is not the attribute of a good fuel.
a. low calorific value
b. low content of non volatile material.
c. moderate rate of combustion.
d. none of the above

27. Natural gas is called a clean fuel because
a. after it is drilled out it is purified and then supplied as fuel.
b. it burns without producing any smoke.
c. none of the above
d. both a & b

28. Calorific value of a fuel may be defined as
a. The amount of heat produced when 1kg of a fuel is completely burnt.
b. The amount of heat produced when 10gms of a fuel is completely burnt.
c. The amount of heat produced when 1 gm of a fuel is completely burnt.
d None of the above

29. The relationship between the two units of calorific value is
a. 1KWH/Kg=5.6 Kj/g
b. 1 KWH/Kg= 2.6 KJ/g
c. 1 KWH/Kg= 3.6 KJ/g
d. None of the above.

30. On complete combustion 1Kg. Of wood produces 17000KJ of energy. What is the calorific value of wood.
a. 17 KJ/g
b. 34 KJ/g
c. 1.7 KJ/g
d. 0.017 KJ/g

Edited and Compiled By

(Ashutosh Pandey)

Director Education Mantra

For Coaching for Science Class X Contact Mr. Ashutosh Pandey

Ph. 9837426072/9759766561

mail: geetedu@gmail.com