A) it reacts with the visible part of the light
B) it reacts with ^he sodium oxide of the glass
C) it reacts with the aluminium oxide of the glass composition
D) it reacts with\[Si{{O}_{2}}\]of the glass
Correct Answer: D
Solution :
HF reacts with\[Si{{O}_{2}}\](silica) of the glass \[4HF+Si{{O}_{2}}\xrightarrow{{}}Si{{F}_{4}}+2{{H}_{2}}O\] \[Si{{F}_{4}}+2HF\xrightarrow{{}}{{H}_{2}}Si{{F}_{6}}\]
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