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Glass is soluble in
Options
(a) HClO₄
(b) Hf
(c) aqua regia
(d) H₂SO₄
Correct Answer:
Hf
Explanation:
Unlike other halogen acids, HF acid attacks silica and glass. Glass being a mixture of sodium and calcium silicates reacts with HF forming soluble sodium and calcium fluorosilicates respectively. e.g., Na₂SiO₃ + 6HF → Na₂SiF₆ + 3H₂O, CaSiO₃ + 6HF → CaSiF₆ + 3H₂O.
Related Questions: - The oxidation number of As in H₂AsO₄⁻ is
- CF₂ = CF₂ is monomer of
- Dinitrogen and dioxygen are main constituents of air but these do not react
- The geometry of Ni(CO)₄ and Ni(PPh₃)₂Cl₂ are
- Heat of formation of H₂O(g) at 25⁰C is -243 kJ,ΔE for the reaction
Topics: S and Some P Block Elements
(157)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The oxidation number of As in H₂AsO₄⁻ is
- CF₂ = CF₂ is monomer of
- Dinitrogen and dioxygen are main constituents of air but these do not react
- The geometry of Ni(CO)₄ and Ni(PPh₃)₂Cl₂ are
- Heat of formation of H₂O(g) at 25⁰C is -243 kJ,ΔE for the reaction
Topics: S and Some P Block Elements (157)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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