classification of hydrides

Question 1

i)Ionic hydrides
ii)LiAlH4
iii)LiBH4

Answer 1

i)hydrides of s block except Be,Mg
ii)LiH+Al2Cl6–>LiAlH4 + LiCl
iii)LiH + B2H6 —>LiBH4

Question 2

i)e- deficient covalent hydrides
ii)e- precise hydrides
iii)e- rich hydrides

Answer 2

i)group 13 hydrides
ii)group 14 hydrides
iii)group 15,16,17 halides

Question 3

i)interstitial hydrides
ii)which elements dont form hydrides
iii)density,hardness,MP:metal hydride,Metal
malleability,ductility:metal hydride<metal
conductivity:metal hydride,metal

Answer 3

i)d and f block elements form interstitial hydrides
ii)Elements of group-7,8,9 dont form hydride .In group-6 only CrH is known.
iii)density,hardness,MP:metal hydride>Metal
malleability,ductility:metal hydride<metal
conductivity:metal hydride=metal