Magnesium (Mg)

Calcium (Ca)

Strontium (Sr)

Barium (Ba)

More NaCl will dissolve

No change will occur

Some NaCl will precipitate

The solution will become unsaturated

Heating Be in atmosphere of ${{\rm{H}}_2}$

The action of ${\rm{BeC}}{{\rm{l}}_2}$ with ${\rm{LiAI}}{{\rm{H}}_4}$

The action of Be with ${\rm{Ca}}{{\rm{H}}_2}$

None of the above

Ionic bonds are formed by the transfer of electrons.

Covalent bonds are formed by the sharing of electrons.

Metallic bonds involve a sea of electrons shared among metal cations.

Hydrogen bonds are stronger than covalent bonds.

Phosphorus pentoxide

Active charcoal

Anhydrous calcium chloride

${\rm{N}}{{\rm{a}}_3}{\rm{P}}{{\rm{O}}_4}$

${\rm{Ba}}{{\rm{H}}_{\rm{2}}}\,{\rm{ < }}\,\,{\rm{Be}}{{\rm{H}}_{\rm{2}}}\,{\rm{ < }}\,\,{\rm{Ca}}{{\rm{H}}_{\rm{2}}}$

${\rm{Be}}{{\rm{H}}_{\rm{2}}}\,{\rm{ < }}\,\,{\rm{Ca}}{{\rm{H}}_{\rm{2}}}\,{\rm{ < }}\,\,{\rm{Ba}}{{\rm{H}}_{\rm{2}}}$

${\rm{Be}}{{\rm{H}}_{\rm{2}}}\,{\rm{ < }}\,\,{\rm{Ba}}{{\rm{H}}_{\rm{2}}}\,{\rm{ < }}\,\,{\rm{Ca}}{{\rm{H}}_{\rm{2}}}$

${\rm{Ca}}{{\rm{H}}_{\rm{2}}}\,{\rm{ < }}\,\,\,{\rm{Be}}{{\rm{H}}_{\rm{2}}}\,{\rm{ < }}\,\,{\rm{Ba}}{{\rm{H}}_{\rm{2}}}$

${\rm{CaC}}{{\rm{O}}_3}$

${\rm{Ca}}{\left( {{\rm{OH}}} \right)_2} + {{\rm{H}}_2}{\rm{O}}$

${\rm{Ca}}{\left( {{\rm{OH}}} \right)_2}$

${\rm{CaO}}$

${\rm{NaOH}}$

${\rm{Ca}}{\left( {{\rm{OH}}} \right)_2}$

${\rm{KOH}}$

${\rm{Be}}{\left( {{\rm{OH}}} \right)_2}$

$\rm{BeH_2}$

$\rm{MgH_2}$

$\rm{CaH_2}$

$\rm{BaH_2}$

${\rm{CaC}}{{\rm{O}}_3}{\rm{and CaO}}$

Slaked lime and water

Slaked lime, sand and water

None of the above

${\rm{S}}{{\rm{r}}^{2 + }}$

${\rm{B}}{{\rm{a}}^{2 + }}$

${\rm{C}}{{\rm{a}}^{2 + }}$

${\rm{M}}{{\rm{g}}^{2 + }}$