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

Question-2. Calorific value gives the

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

Question-3. Ignition temperature is

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

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

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

Question-5. Combustion is a

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

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

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

Question-7. Unburnt carbon particles causes

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

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

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

Question-9. Burning of coal and diesel releases

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

Question-10. Incomplete combustion gives

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

Question-11. Which fuels are used for running automobiles

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

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

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

Question-13. Substance which vaporise during Burning gives

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

Question-14. Fire extinguisher

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

Question-15. Use of______in vehicle reduces pollution

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

Question-16. Which is a solid fuel

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

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

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

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

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

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

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

Question-20. Coal burns with

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

Question-21. There are following zones of a flame

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

Question-22. Charcoal burns in air producing

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

Question-23. Essential requirements for producing fire are

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

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

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

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

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

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

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

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

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

Question-28. Calorific value is measured in

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

Question-29. Innermost zone is the

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

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

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

Question-31. CNG and LPG are the examples of

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

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

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

Question-33. When magnesium ribbon burnt it produce

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

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

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

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

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

Question-36. Combustion of most fuels releases

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

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

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

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

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

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

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

Question-40. The products of combustion are

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

Question-41. In combustion

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

Question-42. Yellow colour in the flame denotes

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

Question-43. The most common fire extinguisher is

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

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

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

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

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

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

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

Question-47. Water is not suitable for fire involving

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

Question-48. Element showing spontaneous combustion is

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

Question-49. Petrol engine gives off gaseous oxides of

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

Question-50. Acid rain is caused by oxides of

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

Question-51. The head of the safety match contains

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

Question-52. Explosion takes place because of

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

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

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

Question-54. Best extinguisher for inflammable Materials is

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

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

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

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

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

Question-57. CO2 is given off by chemicals like

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

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

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

Question-59. On burning fuel produces______amount of heat

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

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

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

Question-61. Rapid combustion is

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

Question-62. Which is better domestic fuel

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



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