Identify the correct statements from the following.
I. All alkaline earth metals give hydrides on heating with hydrogen.
II. Calcium hydroxide is used to purify sugar.
III. $\mathrm{BeCl}_2$ is a dimer in gaseous phase.Identify the correct statement from the following.
A. Among alkali metal ions, $\mathrm{Li}^{+}$has highest hydration enthalpy.
B. Boiling point of alkali metals increases from Li to Cs .
C. Density of K is less than that of Na and Rb .
D. Li has strong tendency to form superoxide.
The correct answer is
Consider the following
Statement - I : Both $\mathrm{BeSO}_4$ and $\mathrm{MgSO}_4$ are readily soluble in water.
Statement - II : Among the nitrates of alkaline earth metals, only $\mathrm{Be}\left(\mathrm{NO}_3\right)_2$ on strong heating gives its oxide, $\mathrm{NO}_2$ and $\mathrm{O}_2$.
The correct answer is
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