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NCERT Class VIII Science Solutions: Chapter 6 - Combustion and Flame Part 1

Question 1:

List conditions under which combustion can take place.

Answer:

Conditions under which combustion can take place are as follows:

  • Fuel is required
  • Air (oxygen) is necessary.
  • Ignition temperature is required.
Illustration: NCERT Class VIII Science Solutions: Chapter 6 - Combustion and Flame Part 1

Question 2:

Fill in the blanks:

  1. Burning of wood and coal causes ________ of air.
  2. A liquid fuel, used in homes is ________.
  3. Fuel must be heated to its ________ ________ before it starts burning.
  4. Fire produced by oil cannot be controlled by ________.

Answer:

  1. Burning of wood and coal causes pollution of air.
    Illustration: NCERT Class VIII Science Solutions: Chapter 6 - Combustion and Flame Part 1
  2. A liquid fuel, used in homes is Liquefied Petroleum Gas (LPG) .
    Illustration: NCERT Class VIII Science Solutions: Chapter 6 - Combustion and Flame Part 1
  3. Fuel must be heated to its Ignition temperature before it starts burning.
    Illustration: NCERT Class VIII Science Solutions: Chapter 6 - Combustion and Flame Part 1
  4. Fire produced by oil cannot be controlled by water.