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Which of the following attacks glass?...

Which of the following attacks glass?

A

HCl

B

HF

C

HI

D

HBr

Text Solution

Verified by Experts

The correct Answer is:
B
Glass being a mixture of sodium and calcium silicates reacts with hydrofluoric acid forming sodium and calcium fluorosilicates respectively
`Na_(2)SiO_(3) + 3H_(2)F_(2) rarr Na_(2)SiF_(6) + 3H_(2)O`
`CaSiO_(3) + 3H_(2)F_(2) rarr CaSiF_(6) + 3H_(2)O`
The etching of glass is based on these reactions
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