Question

Statement 1 : Ortho boric acid crystal are hard and cannot be broken easily into the powder form.
Statement 2 : In the solid state $B(OH{)}_3$units are hydrogen bonded together into two dimensional sheets.

• A. If both Statement $1$ and Statement $2$ are true and the statement $2$ is the correct explanation of the statement $1$
• B. If both Statement $1$ and Statement $2$ are true but statement $2$ is not the correct explanation of the statement $1$
• C. If Statement $1$ is true but Statement $2$ is false
• D. If Statement $1$ is false but Statement $2$ is true

Answer 1

Answer: (D)

In the solid state, the $B(OH{)}_3$ units are hydrogen bonded together into two dimensional sheets with almost hexagonal symmetry. The layered are quite a large distance apart $(3.18\mathring{A})$ and thus the crystal breaks quite easily into very fine particles.