221- Which of the following statements is correct? $(H = 1,\ C = 12,\ O = 16,\ Na = 23\ :\ \mathrm{g.mol^{-1}})$
Acetone is a colorless liquid whose solubility in water is low.
Insoluble substances are materials whose solubility is said to be zero.
The reason vitamin A does not dissolve in water is that the polar part of its molecule dominates.
In a mixture of 0.1 mol 1-butanol with 1000 g of water, only one phase is observed. (The solubility of this alcohol under experimental conditions is 2.7 g per 100 g of water.)
(1)\ 1 (2)\ 2 (3)\ 3 (4)\ 4
\textbf{221-} Which of the following statements is correct? $(H = 1,\ C = 12,\ O = 16,\ Na = 23\ :\ \mathrm{g.mol^{-1}})$
\begin{itemize}
\item Acetone is a colorless liquid whose solubility in water is low.
\item Insoluble substances are materials whose solubility is said to be zero.
\item The reason vitamin A does not dissolve in water is that the polar part of its molecule dominates.
\item In a mixture of 0.1 mol 1-butanol with 1000 g of water, only one phase is observed. (The solubility of this alcohol under experimental conditions is 2.7 g per 100 g of water.)
\end{itemize}
\hfill (1)\ 1 \qquad (2)\ 2 \qquad (3)\ 3 \qquad (4)\ 4
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