Which of the following attacks glass - Vidyadip

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.

$N{a_2}Si{O_3} + 3{H_2}{F_2} \to N{a_2}Si{F_4} + 3{H_2}O$

$CaSi{O_3} + 3{H_2}{F_2} \to CaSi{F_4} + 3{H_2}O$

The etching of glass is based on these reactions.

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