`ADG : KNQ :: BEH : _______`

Arrange the following in the order of their decreasirg acidic strength CH_(4) , LiH , BeH_(2) , H_(2)O , HF , NH_(3)

Select correct code :- (a) In (BeH_2)_n all bond's are 3c - 2e. (b) In (B_2H_6) , all H-atom are present in a plane (c) In I_2Cl_6 , I-Atom sp^3d^2 hybridised (d) In C_2H_6 , C-atom used vacant orbital in a hybridisation

The state of hybridisation of central atom in dimer of BH_(3) and BeH_(2) IS :

The state of hybridisation of central atom in dimer of BH_(3) and BeH_(2) IS :

The state of hybridisation of central atom in dimer of BH_(3) and BeH_(2) IS :

Among CaH_2, BeH_2 , BaH_2 , the order of ionic character is

Give the decreasing order of acidic strength of the following : (a) CH_4 (b) H_2 O ( c) HF (d) NH_3 ( e) LiH (f) BeH_2 .

Sodium metal crystallises in bcc lattice with the cell adge, a equal to 42.29 A˚ . What is the radius (in A˚ ) of sodium atom?

Explain why BeH_(2) molecule has a zero dipole moment although the Be-H bonds are polar?

Arrange the following: CaH_(2), BeH_(2) and TiH_(2) in order of increasing electrical conductance.