JAMB Physics 2013 Objective — Question 22

Question 22 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2013 Objective paper, with the correct answer and a full explanation.

What will happen when a pail of pure water is heated in a place 30m below sea level?

A. It will need more than 100°C to boilCorrect
B. It will boil below 100°C
C. It will still boil at 100°C
D. It will boil at a fluctuating temperature

Explanation

The pressure below sea level is higher than at sea level. Boiling point increases as pressure increases, so water below sea level requires a temperature higher than 100°C to boil.

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