A) molality
B) mole fraction
C) molarity
D) None of these
Correct Answer: A
Solution :
The elevation of boiling temperature is given by \[\Delta {{T}_{b}}={{K}_{b}}\times \]molality where \[{{K}_{b}}\] is molal elevation constant \[{{K}_{b}}=\frac{\Delta {{T}_{b}}}{molality}\] Therefore, molal elevation constant is the ratio of elevation in b.p. to molality.
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