Acid employed for etching of glass is (a) hcl (b) hno3 (c) aqua-regia (d) hf
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HCl is used to etching of glass
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Answer: The correct option is a.
Explanation: Etching of glass is a process of creating art on the surface of glass in the presence of acidic substance.
The acid used in the process of etching is hexaflurosilicic acid which is prepared by mixing silica with hydrochloric acid (HCl), calcium fluoride, concentrated sulfuric acid and quartz material.
Hence, for the preparation of this acid, we require hydrochloric acid.
Therefore the correct option is a.
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