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Q.

Hydrofluoric acid cannot be stored in glass vessels because it reacts with glass to form

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a

Na2SiO3 and F2

b

Na2[SiF4]

c

Na2SiF6

d

SiF2

answer is B.

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Detailed Solution

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HF is used in etching of  the glass, If HF is stored in glass vessel ,it will react with glass to form Na2SiF6

Na2SiO3+6HF→Na2SiF6+3H2O

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