1.

Dihydrogen forms three types of hydrides. (I) hydrides are formed by alkali metals and alkaline earth metals. (ii) hydrides are formed by non-metals and (iii) hydrides are formed by d-and f-block elements at elevated tempreature. Complex metal hydrides such as (iv) and (v) are powerful reducing agents.

Answer»

(i)= Covalent (ii)=Molecular (III) = Saline(iv) NAH , (v) LIH
(i)= Molecular (ii)= Covalent (iii)Ionic(iv)= `LiAlH_(4),(v)= NaBH_(4)`
(i)= Ionic (ii) = Covalent (iii)=Interstitial(iv)= `LiAlH_(4)`(v)= `NaBH_(4)`
(i) = Ionic (ii) = Saline Interstitial(iii)= `LiAlH_(4)` (iv)=`NaBH_(4)`

ANSWER :C


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