Q. Which one of the following reacts with glass?
A) H_{2}SO_{4}
B) HF
C) HNO_{3}
D) K_{2}Cr_{2}O_{7}
Explanation
(b)
Silica$(SiO_{2})$ is present in the glass. This silica reacts with hydrofluoric acid.
SiO_{2}+4HF⟶SiF_{4}+2H_{2}O
SiF_{4}+2HF⟶H_{2}SiF_{6}
_{fluorosilicic acid}
Note: HF is used for the etching of glass.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.