Which of the following acid is formed when $S i F_{4}$ reacts with water?

S i F_{4}

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H_{2} S i F_{4}

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H_{2} S O_{4}

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H_{2} S i F_{6}

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Solution

The correct option is B $H_{2} S i F_{6}$
Silicon tetra fluoride on hydrolysis furnish ortho silicic acid and hydrogen silicofluoride.

$3 S i F_{4} (S i l i c o n t e t r a f l u o r i d e) + 4 H_{2} O (W a t e r) \to H_{4} S i O_{4} (O r t h o s i l i c i c a c i d) + 2 H_{2} S i F_{6} (H y d r o g e n s i l i c o f l u o r i d e)$

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