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A when added to silica gives ` B. A` and (B) are :

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A when added to silica gives ` B. A` and (B) are :
A. `HF, H_2 SiF_4`
B. `HCl, H_2 SiCl_6`
C. `HCl, H_2 SiCl_6`
D. `HI, H_2 SiI_6`
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Correct Answer - A
`underset ((A)) ( 4 HF ) + SiO _2 rarr underset ((B)) (H_2SiF_4) +H_2O`.
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