Question

Which is not the use of orthoboric acid?

• A. As an antiseptic and eye wash.
• B. In glass industry.
• C. In glazes for pottery.
• D. In borax – bead test.

Answer 1

Answer: (D)

In borax – bead test.

Answer 2

: Borax on heating gives $B_{2}O_{3}$ and $NaBO_{2}$ which is glassy mass and used for borax – bead test.