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in the mcq it is written that melting of wax is a physical change but it is a chemical change.

Asked by sainemani 4th February 2017, 2:40 PM
Answered by Expert
Answer:
  • In a chemical change, the composition of the reactant changes after the reaction, i.e a new substance is said to be formed in a chemical reaction.
  • The melting of a wax, does not form a new substance and neither does it change the chemical composition of the wax in due course of melting.
  • The only change that occurs in a melting of the wax is its physical state i.e change from solid into (semi) liquid and then again into solid state.
  • This is the reason why the melting of a wax is supposed to be a physical change.  
Answered by Expert 6th February 2017, 10:05 AM
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