Ncert solutions

Ncert solutions

Grade 8

Combustion and Flame | Exercise

Question 12

Q12) Can the process of rusting be called combustion? Discuss.

Solution:

The process of rusting cannot be called combustion due to the following reasons :

  • Combustion produces energy in the form of heat. No energy is obtained in a rusting process.
  • Combustion is a chemical process in which a combustible substance reacts with oxygen to produce heat and light whereas in rusting, a metal reacts with oxygen to produce metallic oxide.
  • Rusting is a very slow process compared to combustion.
  • Rusting can take place at room temperature whereas combustion takes place only at a specific ignition temperature.

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Question 12

Q12) Can the process of rusting be called combustion? Discuss.

Solution:

The process of rusting cannot be called combustion due to the following reasons :

  • Combustion produces energy in the form of heat. No energy is obtained in a rusting process.
  • Combustion is a chemical process in which a combustible substance reacts with oxygen to produce heat and light whereas in rusting, a metal reacts with oxygen to produce metallic oxide.
  • Rusting is a very slow process compared to combustion.
  • Rusting can take place at room temperature whereas combustion takes place only at a specific ignition temperature.

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subject-cta
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