Alkaline earth metals

Which of the following statements are correct ?

(A) Both LiCl and $\mathrm{MgCl_2}$ are soluble in ethanol.

(B) The oxides $\mathrm{Li_2O}$ and MgO combine with excess of oxygen to give superoxide.

(C) LiF is less soluble in water than other alkali metal fluorides.

(D) $\mathrm{Li_2O}$ is more soluble in water than other alkali metal oxides.

Choose the most appropriate answer from the options given below :

Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution ?

The correct order of melting point is :

s-block element which cannot be qualitatively confirmed by the flame test is

The correct order of density is

Reaction of $\mathrm{BeCl_2}$ with $\mathrm{LiAlH_4}$ gives :

(A) $\mathrm{AlCl_3}$

(B) $\mathrm{BeH_2}$

(C) LiH

(D) LiCl

(E) $\mathrm{BeAlH_4}$

Choose the correct answer from options given below :

Given below are two statements.

Statement I: The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases.

Statement II: Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions.

In the light of the above statements, choose the correct answer from the options given below.

An element A of group 1 shows similarity to an element B belonging to group 2. If A has maximum hydration enthalpy in group 1 then B is :

Statement I : An alloy of lithium and magnesium is used to make aircraft plates.

Statement II : The magnesium ions are important for cell-membrane integrity.

In the light the above statements, choose the correct answer from the options given below

Number of amphoteric compounds among the following is _______.

(A) BeO (B) BaO (C) Be(OH)$_2$ (D) Sr(OH)$_2$

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is :

Consider the following ionization enthalpies of two elements 'A' and 'B'.

Element	1$^{\text{st}}$ (kJ/mol)	2$^{\text{nd}}$ (kJ/mol)	3$^{\text{rd}}$ (kJ/mol)
A	899	1757	14847
B	737	1450	7731

Which of the following statements is correct ?

The correct order of the solubility of alkaline-earth metal sulphates in water is :

Which of the alkaline earth metal halides given below is essentially covalent in nature ?