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Standard VI
Chemistry
Reversible Change
Question

Which of the following is a chemical change?


  1. Burning of coal
  2. Dissolving sugar in water
  3. Dissolving salt in water
  4. Melting of ice

A
Dissolving sugar in water
B
Dissolving salt in water
C
Melting of ice
D
Burning of coal
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Solution
Verified by Toppr

A chemical change is the process in which chemical composition of the substance is changed. Burning of coal (that is carbon) in presence of oxygen gives a different chemical substance (carbon dioxide). So, it is a chemical change.

Dissolving sugar or salt in water, and melting of ice are physical changes as no new chemical substances are formed in the process.

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