Chapter-wise MCQ Questions

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Question-1. The amount of heat energy produced on complete combustion of_____ fuel is called its calorific value.

  1. 1 litre
  2. 1 Kg
  3. 1 milli litre
  4. 1 gram
Answer-1

Question-2. Calorific value gives the

  1. Fuel efficiency
  2. None of the options
  3. Amount of light
  4. Amount of heat
Answer-2

Question-3. Ignition temperature is

  1. Lowest temperature at catch fire
  2. Higher temperature at catch fire
  3. Any temperature
  4. None of the options
Answer-3

Question-4. Which is the hottest part in the flame of the candle

  1. Blue
  2. Yellow
  3. Black
  4. Wax part
Answer-4

Question-5. Combustion is a

  1. Chemical process
  2. None of the options
  3. Both Chemical process and Physical process
  4. Physical process
Answer-5

Question-6. Global warming is caused due to…............concentration of Co2 in air

  1. Increased
  2. None of the options
  3. Both Increased and Decreased
  4. Decreased
Answer-6

Question-7. Unburnt carbon particles causes

  1. Respiratory problems
  2. Throat problems
  3. Brain infections
  4. Stomach infections
Answer-7

Question-8. Like fuel the sun also provides heat and light. The process taking place in the sun is called

  1. Nuclear process
  2. Combustion
  3. Burning
  4. All of these
Answer-8

Question-9. Burning of coal and diesel releases

  1. SO2
  2. CO
  3. CO2
  4. NO2
Answer-9

Question-10. Incomplete combustion gives

  1. CO
  2. None of the options
  3. CO2
  4. Carbon
Answer-10

Question-11. Which fuels are used for running automobiles

  1. Diesel
  2. Wood
  3. Coal
  4. Charcoal
Answer-11

Question-12. A chemical process in which a substance reacts with oxygen to give off heat is called

  1. Conduction
  2. Conjunction
  3. Combustion
  4. Confusion
Answer-12

Question-13. Substance which vaporise during Burning gives

  1. Flame
  2. None of the options
  3. Combustion
  4. Sound
Answer-13

Question-14. Fire extinguisher

  1. Bring down the temperature of fuel and Cut off the supply of air
  2. Bring down the temperature of fuel
  3. Cut off the supply of air
  4. None of the options
Answer-14

Question-15. Use of______in vehicle reduces pollution

  1. CNG
  2. None of the options
  3. Diesel
  4. Petrol
Answer-15

Question-16. Which is a solid fuel

  1. Wax
  2. Wood
  3. Diesel
  4. Petrol
Answer-16

Question-17. Which one of the following is fuel of our body?

  1. Food
  2. Water
  3. Diesel
  4. Petrol
Answer-17

Question-18. When we heat water in a paper bowl over a candle, the paper does not catch fire because

  1. Paper is not inflamable
  2. Paper gets wet
  3. Due to water the ignition temperature of paper is not reached
  4. This is not possible
Answer-18

Question-19. The substances which have very low ignition temperature and can easily catch fire with a flame are called

  1. Inflammable substances
  2. Flaming substance
  3. Fire proof substance
  4. None of the above
Answer-19

Question-20. Coal burns with

  1. Only glow
  2. Flame
  3. Flame and only glow
  4. None of the options
Answer-20

Question-21. There are following zones of a flame

  1. Three
  2. Two
  3. Four
  4. None of the options
Answer-21

Question-22. Charcoal burns in air producing

  1. CO2
  2. O2
  3. H2
  4. CO
Answer-22

Question-23. Essential requirements for producing fire are

  1. Fuel
  2. Air
  3. Heat
  4. All of these
Answer-23

Question-24. CO2 is stored as a liquid in cylinder at

  1. High pressure
  2. Low pressure
  3. High temperature
  4. Low temperature
Answer-24

Question-25. Goldsmith uses…................part of the flame for melting gold

  1. Outermost
  2. Middle
  3. Innermost
  4. both (b&c)
Answer-25

Question-26. Goldsmith uses…...........part of the flame for melting gold

  1. Outermost
  2. Innermost and Middle
  3. Innermost
  4. Middle
Answer-26

Question-27. In the sun, heat and light are produced by

  1. Nuclear reactions
  2. None of the options
  3. Ionic reactions
  4. Chemical reactions
Answer-27

Question-28. Calorific value is measured in

  1. Kilo joule per Kg
  2. Kilometre
  3. Kilograms
  4. Kilo joule
Answer-28

Question-29. Innermost zone is the

  1. Hottest part
  2. Moderately hot part
  3. Least hot part
  4. Cold part
Answer-29

Question-30. During the process of combustion…..............is given out

  1. Both heat & light
  2. Sound
  3. Light
  4. Heat
Answer-30

Question-31. CNG and LPG are the examples of

  1. Gaseous fuels
  2. Solid fuels
  3. Liquid fuels
  4. They are not fuels
Answer-31

Question-32. Ideal fuel has…................calorific value

  1. High
  2. Moderate
  3. Low
  4. Zero
Answer-32

Question-33. When magnesium ribbon burnt it produce

  1. Magnesium hydroxide
  2. Magnesium oxide
  3. Magnesium chloride
  4. Magnesium sulphate
Answer-33

Question-34. The lowest temperature at which a Substance catches fire is called its

  1. Ignition temperature
  2. Critical temperature
  3. Melting point
  4. Boiling point
Answer-34

Question-35. Combustion is a reaction in which a Substance reacts with

  1. Oxygen
  2. Chlorine
  3. Nitrogen
  4. Hydrogen
Answer-35

Question-36. Combustion of most fuels releases

  1. CO2
  2. Oxygen
  3. NO2
  4. SO2
Answer-36

Question-37. Amount of heat energy produced on…............combustion of 1kg of fuel is Calorific value

  1. Complete
  2. Half
  3. None of the options
  4. Incomplete
Answer-37

Question-38. When the match struck against rubbing surface, red phosphorous

  1. Converts into white phosphorous
  2. Reacts with potassium chlorate
  3. None of the options
  4. Ignite antimony trisulphide
Answer-38

Question-39. Which substance give heat and light after combustion

  1. Fuel
  2. Flame
  3. Ombustion
  4. None of the options
Answer-39

Question-40. The products of combustion are

  1. Carbon dioxide and water
  2. Oxygen and water
  3. Only carbon dioxide
  4. Only oxygen
Answer-40

Question-41. In combustion

  1. Both heat and light is produced
  2. Only heat is produced
  3. Only light is produced
  4. All are correct
Answer-41

Question-42. Yellow colour in the flame denotes

  1. Middle zone
  2. Innermost zone
  3. Outermost part
  4. None of the options
Answer-42

Question-43. The most common fire extinguisher is

  1. Water
  2. Hydrogen
  3. Oxygen
  4. CO2
Answer-43

Question-44. For combustion…..............is necessary

  1. Air
  2. Water
  3. Paper
  4. Fuel
Answer-44

Question-45. Which of the following has lower ignition temperature?

  1. Kerosene oil
  2. Vegetable oil
  3. Paper
  4. Wood
Answer-45

Question-46. Which of the following is inflammable Substances?

  1. Petrol
  2. Wood
  3. Paper
  4. Straw
Answer-46

Question-47. Water is not suitable for fire involving

  1. Both Petrol and Oil
  2. None of the options
  3. Petrol
  4. Oil
Answer-47

Question-48. Element showing spontaneous combustion is

  1. Lithium
  2. Copper
  3. Phosphorous
  4. Calcium
Answer-48

Question-49. Petrol engine gives off gaseous oxides of

  1. Nitrogen
  2. Carbon
  3. Phosphorous
  4. Sulphur
Answer-49

Question-50. Acid rain is caused by oxides of

  1. Sulphur, Nitrogen
  2. Sulphur, Carbon
  3. Phosphorous, Carbon
  4. Carbon, Nitrogen
Answer-50

Question-51. The head of the safety match contains

  1. Both Potassium Chlorate and Antimony trisulphide
  2. None of the options
  3. Potassium Chlorate
  4. Antimony trisulphide
Answer-51

Question-52. Explosion takes place because of

  1. Release of large amount of gas under pressure due to sudden reaction
  2. Release of large amount of heat
  3. Release of large amount of light
  4. None of the above
Answer-52

Question-53. In the presence of water, ignition Temperature of paper is

  1. Decrease
  2. None of the options
  3. Remain constant
  4. Increase
Answer-53

Question-54. Best extinguisher for inflammable Materials is

  1. CO2
  2. CO
  3. SO2
  4. Water
Answer-54

Question-55. Which one of the following is combustible?

  1. Iron nail
  2. Glass
  3. Stone pieces
  4. Paper
Answer-55

Question-56. Which one of the following is non Combustible?

  1. Stone piece
  2. Matchsticks
  3. Straw
  4. Paper
Answer-56

Question-57. CO2 is given off by chemicals like

  1. Sodium bicarbonate
  2. Calcium sulphate
  3. Sulphuric acid
  4. Sodium sulphate
Answer-57

Question-58. A person caught fire on clothes is wrapped with blanket because

  1. The person suddenly feels cold
  2. To hide the burnt body parts
  3. The person?s clothes gets burnt
  4. To reduce air supply and put fire off
Answer-58

Question-59. On burning fuel produces______amount of heat

  1. Large
  2. No heat
  3. Very less
  4. Less
Answer-59

Question-60. When oil or petrol catches fire, water is not used to extinguish it because

  1. Water covers oil and oil burns under water layer which may not be noticeable
  2. Water is heavier than oil / petrol and so remains below the oil layer which continues to burn
  3. Water get mixed with oil and increases fire
  4. Water gets evaporated
Answer-60

Question-61. Rapid combustion is

  1. When gas burns, it produces heat and light
  2. When material suddenly burst into flames
  3. When there is evolution of heat
  4. None of these
Answer-61

Question-62. Which is better domestic fuel

  1. LPG
  2. Coal
  3. Wood
  4. CNG
Answer-62



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