First slide

Chemical properties

Question

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

Easy

A

Na₂SiO₃ and F₂
B

Na₂SiF₆
C

SiF₂
D

Na₂[SiF₄]

Solution

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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