MCQ
When $CuSO_4$ is added to a solution of ammonia
- AFreezing point is lowered
- ✓Freezing point is raised
- CBoiling point is raised
- DBoth $(A)$ and $(C)$
Depression in freezing point and elevation in boiling point are directly proportional to the van 't hoff factor. Decreases in number of particles causes the increase in freezing point and decrease in the boiling point.
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$1.\,Zn|Z{n^{2 + }}\,\left( {1\,M} \right)||C{u^{2 + }}\left( {1\,M} \right)|Cu$
$2.\,Zn|Z{n^{2 + }}\,\left( {0.1\,M} \right)||C{u^{2 + }}\left( {1\,M} \right)|Cu$
$3.\,Zn|Z{n^{2 + }}\,\left( {1\,M} \right)||C{u^{2 + }}\left( {0.1\,M} \right)|Cu$
are represented by $E_1,\,E_2,\,E_3$. Which of the following statement is true?
$I :$ The three elements are metals.
$II :$ The electro negativities decrease from $X$ to $Y$ to $Z$.
$III :$ The atomic radius decreases in the order $X, Y$ and $Z.$
$IV : X, Y$ and $Z$ could be phosphorus, aluminium and sodium respectively.