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JAMB Physics 2013 Objective — Question 20

Question 20 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2013 Objective paper, with the correct answer and a full explanation.

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Foods cook quicker in salt water because of the effect of

  • A. dissolved substances on the boiling pointCorrect
  • B. atmospheric pressure on the boiling point
  • C. food nutrients on the thermal energy
  • D. salts on the thermal conductivity of water

Explanation

This is due to the effect of dissolved substances on the boiling point — impurities generally raise boiling points and lower melting points.

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