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Sunday, 21 June 2026
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Physics Past Questions and Answers

Topic: Evaporation

Jamb Physics Questions - Evaporation

Question 1:
Which of the following statements give the TRUE difference between evaporation and boiling? i. Evaporation occurs at all temperatures while boiling occurs at a fixed temperature for a given pressure. ii. Evaporation is a surface phenomenon while boiling is an interior phenomenon. iii. Evaporation is affected by surface area while boiling is not.
  • A I and ii only
  • B I and iii only
  • C Ii and iii only
  • D I, ii, iii.
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Question 2:
If 1.2 x 106J of heat energy is given off in 1 sec from a vessel maintained at a temperature gradient of 30Km-1, the surface area of the vessel is
  • A 1.0 x 10<sup style='font-size: smaller;'>2</sup>m<sup style='font-size: smaller;'>2</sup>
  • B 9. 0 x 10<sup style='font-size: smaller;'>2</sup>m<sup style='font-size: smaller;'>2</sup>
  • C 1.0 x 10<sup style='font-size: smaller;'>3</sup>m<sup style='font-size: smaller;'>2</sup>
  • D 9.0 x 10<sup style='font-size: smaller;'>4</sup>m<sup style='font-size: smaller;'>2</sup>
View Answer & Explanation