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Question

Silica is soluble in

A
HCl
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B
HNO3
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C
H2SO4
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D
HF
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Solution

The correct option is D HF
Hydrofluoric acid has the ability to dissolve (most) oxides, glass and silicates.
SiO2+6HFH2SiF6+2H2O

Hence, the correct answer is option (d).

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