Question

Alkali earth metal nitrates that does not crystallize with hydrogen molecules

Answer 1

Action of alkali metals with water and compounds containing acidic hydrogen -

Reacts readily forming hydroxides with the liberation of hydrogen

- wherein

2M+2H2O=2MOH=H2

Nature of Nitrates of alkali metals -

Decomposed upon heating to nitrites and evolve O{_{2}}

- wherein

2NaNO{_{3}\overset{\Delta }{\rightarrow}2NaNO{_{2}}+O{_{2}}

As we knoe that :

Ba \left ( NO_{3} \right )_{2}\rightleftharpoons Ba^{2+}+2NO_{3}^{-}

Ba2+ ion has low poolarization power ,because smaller in size of center atom mire water molecules will crystallize hence Ba \left ( NO_{3} \right )_{2}\rightlefthar is answer due to its largest size of +ve ion

Option 1)

 

 

Order of reactivity of alkali metal with water -

Increases on going down the group

- wherein

Due to increase in electropositivity