passwella.
Menu

JAMB Chemistry 2013 Question 2

Question 2

Separation of Mixtures

The presence of an impurity in substance will cause the melting point to

  1. A.be zero.
  2. B.reduce.
  3. C.increase.
  4. D.be stable.
Show the answer and explanation

Answer: B (reduce.)

Explanation

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