Identify the correct statements with respect | vedclass

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(B) $I$. Beryllium oxide $(BeO)$ is amphoteric in nature,reacting with both acids and bases. This is a correct statement.$II$. Beryllium does not reac

Vedclass · Accepted Answer

$I$ & $III$ only

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(B) $I$. Beryllium oxide $(BeO)$ is amphoteric in nature,reacting with both acids and bases. This is a correct statement.$II$. Beryllium does not react directly with hydrogen to form $BeH_2$. This is an incorrect statement.$III$. $BeH_2$ is prepared by the reaction of $BeCl_2$ with $LiAlH_4$: $2BeCl_2 + LiAlH_4 \rightarrow 2BeH_2 + LiCl + AlCl_3$. This is a correct statement.$IV$. Beryllium sulphate $(BeSO_4)$ is highly soluble in water due to the high hydration enthalpy of the small $Be^{2+}$ ion. It is not the least soluble. This is an incorrect statement.Therefore,statements $I$ and $III$ are correct.

Metal	Uses
$1. \text{Be}$	$c. \text{To prepare windows of X-rays}$
$2. \text{Ca}$	$d. \text{To remove air from vacuumized tubes}$
$3. \text{Mg}$	$a. \text{To prepare Grignard reagent}$

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Metal Uses

$1. \text{Be}$ $c. \text{To prepare windows of X-rays}$

$2. \text{Ca}$ $d. \text{To remove air from vacuumized tubes}$

$3. \text{Mg}$ $a. \text{To prepare Grignard reagent}$

Why are the elements of group-$2$ known as alkaline earth metals?

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