Which of the following attacks glass – InterviewSolution

1.	Which of the following attacks glass
Answer» HCl HF HI HBr Solution :Glass being a mixture of sodium and calcium SILICATES reacts with hydrofluorec acid forming sadium and calcium fluorosilicates respectively. `Na_(2)SiO_(3)+HF to Na_(2)SiF_(6)+3H_(2)O` `CaSiO_(3)+6HF+CaSiF_(6)+3H_(2)O` The ETCHING of glass is based on these reactions.

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