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Unilorin Post-UTME Chemistry 2022 (Model questions) Question 7

Question 7

Separation of Mixtures

The presence of impurities in a solid will make the melting point to

  1. A.decrease
  2. B.increase
  3. C.remain unchanged
  4. D.be zero
Show the answer and explanation

Answer: A (decrease)

Explanation

Impurities disturb the regular arrangement of particles in a solid, so it melts at a lower temperature and over a range.