Solutions and Colligative Properties - Result Question 12
13. An azeotropic solution of two liquids has boiling point lower than either of them when it
(1981, 1M)
(a) shows negative deviation from Raoult’s law
(b) shows no deviation from Raoult’s law
(c) shows positive deviation from Raoult’s law
(d) is saturated
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Answer:
Correct Answer: 13. (c)
Solution:
In case of positive deviation from Raoult’s law, the observed vapour pressure is greater than the ideal vapour pressure and boiling point of azeotrope becomes lower than either of pure liquid.
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