Question

Which of the following statements is false?

• A. $BH_3$ is not a stable compound.
• B. All the B-H bonds in $B_2H_6$ are equal.
• C. The horon hydrides are readily hydrolysed.
• D. Boron hydrides are prepared by the action of dil. HCl on ${Mg_3B_2}$ .

Answer 1

Answer: (B)

All the B-H bonds in $B_2H_6$ are equal.

Answer 2

All the B-H bonds in $B_2H_6$ are not equal. The four terminal B-H bonds are shorter (B-H bond length = 1.19 $\mathring A$) than the two bridged B-H-B bonds (bond length - 1.33 $\mathring A$).

So, the correct option is (B): All the B-H bonds in $B_2H_6$ are equal.