Which one of the following reacts with glass ?

Question

Which one of the following reacts with glass ? (A)  H2SO4  (B)  HF  (C)  HNO3  (D)  K2Cr2O7

Tardigrade Admin · Accepted Answer

Silica ( SiO 2) is present in the glass. This silica react with hydrofluoric acid. SiO 2+4 HF longrightarrow SiF 4+2 H 2 O SiF 4+2 HF longrightarrow underset text fluorosilicic acidH 2 SiF 6 Note: HF is used for the etching of glass.

Q. Which one of the following reacts with glass ?

$H_{2} S O_{4}$

$H F$

$H N O_{3}$

$K_{2} C r_{2} O_{7}$

Silica $(S i O_{2})$ is present in the glass. This silica react with hydrofluoric acid.

$S i O_{2} + 4 H F ⟶ S i F_{4} + 2 H_{2} O$

$S i F_{4} + 2 H F ⟶ fluorosilicic acid H_{2} S i F_{6}$

Note: HF is used for the etching of glass.

Q. Which one of the following reacts with glass ?

H2​SO4​

HF

HNO3​

K2​Cr2​O7​

Silica (SiO2​) is present in the glass. This silica react with hydrofluoric acid. SiO2​+4HF⟶SiF4​+2H2​O SiF4​+2HF⟶fluorosilicic acidH2​SiF6​​ Note: HF is used for the etching of glass.

$H_{2} S O_{4}$

$H F$

$H N O_{3}$

$K_{2} C r_{2} O_{7}$

Silica $(S i O_{2})$ is present in the glass. This silica react with hydrofluoric acid.

$S i O_{2} + 4 H F ⟶ S i F_{4} + 2 H_{2} O$

$S i F_{4} + 2 H F ⟶ fluorosilicic acid H_{2} S i F_{6}$

Note: HF is used for the etching of glass.