If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should
  1. increase
  2. remain unchanged
  3. decrease
  4. first increase then decrease

Solution

Because thermal energy decreases, therefore mass should increase

Asked in: JEE Main 2002

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