In B₂H₆ 

(1) there is direct boron-boron bond

(2) the structure is similar to that of C₂H₆

(3) the boron atoms are linked through hydrogen bridges

(4) all the atoms are in one plane

From the B₂H₆ all the following can be prepared except:

(1) H₃BO₃

(2) [BH₂(NH₃)₂]+ [BH₄]-

(3) B₂(CH₃)₆

(4) NaBH₄

An element that cannot form ${\mathrm{MF}}_6^{3-}$ ion is-

Boric acid is polymeric because of:

1. Its acidic nature

2. Presence of hydrogen bonds

3. Its monobasic nature

4. Its geometry

The product formed in the reaction,

$BC{l}_3+H_{2}O\to$Product is:

(1) $H_{3}B{O}_3+HCl$

(2) $B_2{O}_3+HOCl$

(3) $B_2{H}_6+HCl$

(4) no reaction