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Standard VII
Chemistry
Question

Which of these is a physical change?
  1. Melting of wax
  2. Fermentation
  3. Formation of salt solution
  4. Boiling of an egg

A
Melting of wax
B
Boiling of an egg
C
Formation of salt solution
D
Fermentation
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Solution
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Melting of wax is a physical change because no new substance is formed in the change. The other three options are chemical changes as new substances are formed.

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