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NDA 2 2024 GAT, question 120

Topic: Chemistry

Q120

Which one among the following is an example of chemical change ?

  1. (a) Sublimation of camphor
  2. (b) Melting of ice
  3. (c) Heating of an iron rod
  4. (d) Mixing of NaOHNaOH and HClHClCorrect answer

Solution.

Answer: (d) Mixing of NaOHNaOH and HClHCl

  1. Neutralisation forms new substances: NaOH+HCl→NaCl+H₂O.
  2. This distinguishes a chemical change from changes involving only state, shape or physical arrangement.