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MHT CET2007Chemistryp Block Elements (Group 15, 16, 17 & 18)

Which one of the following reacts with glass?

Options

  1. AH ₂ SO ₄
  2. BHF
  3. CHNO ₃
  4. DK ₂ Cr ₂ O ₇

Correct answer

B. HF

Step-by-step solution

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

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