Which can do glass etching?

H I O_{4}

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S i F_{4}

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H F

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H {N O}_{3}

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Solution

The correct option is C $H F$
Glass is a mixture of sodium and calcium silicate. It reacts with $H F$ forming sodium and calcium fluorosilicates respectively.
${N a}_{2} S i O_{3} + 6 H F ⟶ {N a}_{2} S i F_{6} + 3 H_{2} O$
$C a S i O_{3} + 6 H F ⟶ C a S i F_{6} + 3 H_{2} O$
The etching of glass is based on these reactions.

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Which of the following chemicals is used in etching of glass?

N a O H

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

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(3) Aquaregia (4) conc. Sulphuric acid

Code:

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