Question:
Which of the following statement is not correct for azeotropes?
Which of the following statement is not correct for azeotropes?
Show Hint
Minimum boiling azeotropes → positive deviation; Maximum boiling azeotropes → negative deviation.
Updated On: Jun 20, 2026
- At boiling point, composition of liquid and vapour phase is same
- Minimum boiling azeotrope shows positive deviation from Raoult’s law
- Maximum boiling azeotrope shows positive deviation from Raoult’s law
- HNO\(_3\) and H\(_2\)O form maximum boiling azeotrope
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understand azeotropes.
Azeotropes are binary mixtures that boil at constant temperature and have identical composition in liquid and vapour phase. They behave like pure substances at azeotropic composition.
Step 2: Analyze statement (1).
At azeotropic boiling point, liquid and vapour phase compositions are equal. This is a defining property of azeotropes, so this statement is correct.
Step 3: Analyze minimum boiling azeotrope.
Minimum boiling azeotropes show positive deviation from Raoult’s law due to weaker intermolecular attractions than ideal solution. Hence this statement is correct.
Step 4: Analyze maximum boiling azeotrope.
Maximum boiling azeotropes show negative deviation from Raoult’s law due to stronger intermolecular attraction between components. Therefore saying it shows positive deviation is incorrect.
Step 5: Example verification.
HNO\(_3\) and H\(_2\)O form a maximum boiling azeotrope due to strong hydrogen bonding and negative deviation from Raoult’s law.
Step 6: Final conclusion.
Thus, the incorrect statement is that maximum boiling azeotrope shows positive deviation from Raoult’s law.
Final Answer: \[ \boxed{(3)} \]
Azeotropes are binary mixtures that boil at constant temperature and have identical composition in liquid and vapour phase. They behave like pure substances at azeotropic composition.
Step 2: Analyze statement (1).
At azeotropic boiling point, liquid and vapour phase compositions are equal. This is a defining property of azeotropes, so this statement is correct.
Step 3: Analyze minimum boiling azeotrope.
Minimum boiling azeotropes show positive deviation from Raoult’s law due to weaker intermolecular attractions than ideal solution. Hence this statement is correct.
Step 4: Analyze maximum boiling azeotrope.
Maximum boiling azeotropes show negative deviation from Raoult’s law due to stronger intermolecular attraction between components. Therefore saying it shows positive deviation is incorrect.
Step 5: Example verification.
HNO\(_3\) and H\(_2\)O form a maximum boiling azeotrope due to strong hydrogen bonding and negative deviation from Raoult’s law.
Step 6: Final conclusion.
Thus, the incorrect statement is that maximum boiling azeotrope shows positive deviation from Raoult’s law.
Final Answer: \[ \boxed{(3)} \]
Was this answer helpful?
0
0
Top AP EAPCET Chemistry Questions
- The four quantum numbers of the valence electron of potassium are :
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
- In which of the following the election gain enthalpy of elements is correctly arranged?
- The radii of $ \text{F,}{{\text{F}}^{-}}\text{O} $ and $ {{\text{O}}^{2-}} $ are in the order
- Which of the following has the highest first ionization potential?
View More Questions
Top AP EAPCET Types of Solutions Questions
- What is the normality of a solution containing 4.9 g of \( \text{H}_2\text{SO}_4 \) in 500 mL of solution? (Molar mass of \( \text{H}_2\text{SO}_4 \) = 98 g/mol)
- The osmotic pressure of a solution is given by the relation
- Assertion (A): Molality of solution increases with temperature. Reason (R): Molality expression does not involve any volume term.
- At \(T(K)\), the molarity of \(CO_2\) in \(200\ mL\) of soda water packed under a pressure of \(3.4\ bar\) is \(\left(K_H\right.\) of \(CO_2\) in water is \(1.7\times 10^3\ bar\) at \(T(K)\left.\right)\)
- The depression in freezing point of a solution of molality \(0.01\ mol\ kg^{-1}\) is highest with respect to which of the following solvents? (Values of \(K_f\) are given in brackets)
View More Questions
Top AP EAPCET Questions
- A body is projected from the ground at an angle of $\tan^{-1} \left( \frac{8}{7}\right)$ with the horizontal. The ratio of the maximum height attained by it to its range is
- The four quantum numbers of the valence electron of potassium are :
- A lens forms real and virtual images of an object, when the object is at $u_{1}$ and $u_{2}$ distances respectively. If the size of the virtual image is double that of the real image, then the focal length of the lens is (take, the magnification of the real image as $m$ )
- Two spheres $P$ and $Q$, each of mass $200\, g$ are attached to a string of length one metre as shown in the figure. The string and the spheres are then whirled in a horizontal circle about $O$ at a constant angular speed. The ratio of the tension in the string between $P$ and $Q$ to that of between $P$ and $O$ is $(P$ is at mid-point of the line joining $O$ and $Q$ )
- The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is
View More Questions