Which of the following statement(s) is/are true regarding the boiling point of a liquid?
(i) The temperature at which the liquid and the vapour states of the substance coexist is called its boiling point.
(ii) The temperature at which the liquid and the solid states of the substance coexist is called its boiling point.
(iii) The boiling point for water is 273 K.
-
A.
Both (ii) and (iii)
-
B.
Both (i) and (iii)
-
C.
Only (i)
-
D.
Only (ii)
Correct Answer:
C. Only (i)
Explanation:
The boiling point is defined as the specific temperature at which a substance transitions between its liquid and gaseous phases, representing a state of equilibrium where both vapors and liquids exist simultaneously. Statement (ii) is incorrect because the coexistence of solid and liquid phases refers to the melting or freezing point, not the boiling point. Statement (iii) is also false because the boiling point of pure water at standard atmospheric pressure is 373 K (100 degrees Celsius), whereas 273 K is its freezing point. Therefore, only the first statement accurately describes the boiling point.
Click below to open Discussion & Feedback
0 Issues
Please
login to comment or Report Issues.