1.

Glass can be etched or scratched by which of the following materials? (1) Diamond (2) Hydrofluoric acid (3) Aquaregia (4) conc. Sulphuric acid Code:

Answer»

Glass can be etched or scratched by which of the following materials?

(1) Diamond (2) Hydrofluoric acid

(3) Aquaregia (4) conc. Sulphuric acid

Code:




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