Question:
$A \,5\%$ solution of cane sugar $(M.W. = 342)$ is isotonic with $1\%$ solution of substance $X$. The molecular weight of $X$ is
$A \,5\%$ solution of cane sugar $(M.W. = 342)$ is isotonic with $1\%$ solution of substance $X$. The molecular weight of $X$ is
Updated On: Jun 23, 2023
- $171.2$
- $68.4$
- $34.2$
- $136.2$
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The Correct Option is B
Solution and Explanation
Being isotonic, molar concentration of cane sugar = molar concentration of substance $X$
$\frac{5}{342} \times \frac{1000}{100}$
$= \frac{1}{x} \times \frac{1000}{100}$
(let the molecular weight of $X = x$)
$x = \frac{342}{5} = 68.4$
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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.