iran-konkur 2019 Q211

iran-konkur · Other · konkur-riazi_1398_specialized_new-curriculum Not Maths
211. Referring to the figure below, how many of the following statements about salt $\text{MX}$ are correct?
  • At point B, the solution of this salt is saturated.
  • Point A shows the dissolution of this salt at $0^\circ\text{C}$.
  • At point D, the solvent can dissolve more of this salt.
  • At point C, the solvent has been able to dissolve more than the saturation limit of this salt.

[Figure: Solubility curve of salt MX; x-axis: temperature ($^\circ$C) from 0 to 80; y-axis: solubility; curve passes through points A (at 0), B, C, D marked on and around the curve.]
(1) $1$ (2) $2$ (3) $3$ (4) $4$
%% Page 22 Chemistry 121-A Page 21
\textbf{211.} Referring to the figure below, how many of the following statements about salt $\text{MX}$ are correct?
\begin{itemize}
    \item At point \textbf{B}, the solution of this salt is saturated.
    \item Point \textbf{A} shows the dissolution of this salt at $0^\circ\text{C}$.
    \item At point \textbf{D}, the solvent can dissolve more of this salt.
    \item At point \textbf{C}, the solvent has been able to dissolve more than the saturation limit of this salt.
\end{itemize}

\textit{[Figure: Solubility curve of salt MX; x-axis: temperature ($^\circ$C) from 0 to 80; y-axis: solubility; curve passes through points A (at 0), B, C, D marked on and around the curve.]}

(1) $1$ \hfill (2) $2$ \hfill (3) $3$ \hfill (4) $4$



%% Page 22
\textbf{Chemistry} \hfill \textbf{121-A} \hfill \textbf{Page 21}

\medskip