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ICSE Class 7 Chemistry Question 2 of 11

Language of Chemistry — Question 2

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Question

Question 2

State four conditions necessary for chemical reactions to take place.

Answer

The four conditions necessary for chemical reactions to take place are:

  1. Close contact: For a chemical reaction to take place the reactants must come into close contact i.e. they should be mixed.
  2. Solution form: Some substances react with each other only when they are mixed in solution form.
  3. Heat: Some reactants need to be heated to undergo a chemical change.
  4. Light: Some reactions take place in the presence of light.