Question

At $283\text{K}$, a saturated solution of solid $X$ can be prepared by dissolving $21.0\text{g}$ of it in $100\text{g}$ of water. The maximum amount of $X$ which can be dissolved in $100\text{g}$ of water at $313\text{K}$ is $62.0\text{g}$. An attempt is made to dissolve $50.0\text{g}$ of $X$ in $100\text{g}$ of water at $313\text{K}$.
A) All the $50.00\text{g}$ of $X$ will dissolve at $313\text{K}$.
B) At $313\text{K}29.0\text{g}$ of $X$ will remain undissolved.
C) Solubility of $X$ decreases with increase of temperature.

Which of the above statements are correct?

• A. A $\&$ B
• B. A only
• C. B $\&$ C
• D. A $\&$C

Answer 1

The correct option is B A only

As the maximum amount of $X$ which can be dissolved in $100\text{g}$ of water at $313\text{K}$ is $62.0\text{g}$, so all $50\text{g}$ can be dissolved. Opinion A is correct.

As $62\text{g}$ is the maximum amount soluble, there will not be any solute dissolved. So, option B is incorrect.

With the increase of temperature, solubility of solute increases. Option C is incorrect.