MCQ
Which of the following attacks glass
- A$HCl$
- ✓$HF$
- C$HI$
- D$HBr$
✓
Answer
Correct option: B.
$HF$
b
(b) Glass being a mixture of sodium and calcium silicates reacts with hydrofluoric acid forming sodium and calcium fluorosilicates respectively.
(b) Glass being a mixture of sodium and calcium silicates reacts with hydrofluoric acid forming sodium and calcium fluorosilicates respectively.
$N{a_2}Si{O_3} + 3{H_2}{F_2} \to N{a_2}Si{F_4} + 3{H_2}O$
$CaSi{O_3} + 3{H_2}{F_2} \to CaSi{F_4} + 3{H_2}O$
The etching of glass is based on these reactions.
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