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Question:
Which one of the following has minimum freezing point ?
Which one of the following has minimum freezing point ?
Updated On: Jun 23, 2023
- $0.1\,M\,NH_{4}Cl$
- $0.1\,M\,BaSO_{4}$
- $0.1\,M\,Al_{2}\left(SO_{4}\right)_{3}$
- $0.1\,M\,K_{2}Cr_{2}O_{7}$
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The Correct Option is C
Solution and Explanation
Depression in freezing point $\propto$ no. of particles in the solution
$\begin{matrix}&NH_{4}Cl&BaSO_{4}&K_{2}Cr_{2}O_{7}&Al_{2}\left(SO_{4}\right)_{3}\\ {\text{No. of particles}}&2&2&3&5\end{matrix}$
The depression in freezing points $(\Delta T_f)$ will be in the order;
$NH_4Cl = BaSO_4 < K_2Cr_2O_7 < Al_2(SO_4)_3$
Thus, $Al_2(SO_4)_3$ will have maximum depression in freezing point i.e., its actual freezing point will be minimum.
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Concepts Used:
Solutions
A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm.
For example, salt and sugar is a good illustration of a solution. A solution can be categorized into several components.
Types of Solutions:
The solutions can be classified into three types:
- Solid Solutions - In these solutions, the solvent is in a Solid-state.
- Liquid Solutions- In these solutions, the solvent is in a Liquid state.
- Gaseous Solutions - In these solutions, the solvent is in a Gaseous state.
On the basis of the amount of solute dissolved in a solvent, solutions are divided into the following types:
- Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
- Saturated Solution- A solution in which no solute can be dissolved after reaching a certain amount of temperature is known as an unsaturated saturated solution.
- Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.
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