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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: - If KMnO₄ is reduced by oxalic caid, in an acidic medium, then oxidation number of Mn changes from
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Topics: S and Some P Block Elements
(157)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If KMnO₄ is reduced by oxalic caid, in an acidic medium, then oxidation number of Mn changes from
- The complex [Co(NH₃)₅Br]²⁺ SO₄²⁻ and [Co(NH₃)₅SO₄]⁺ Br⁻ are
- In alkaline hydrolysis of a tertiary alkyl halides by aqueous alkali,
- Which one of the following statements is incorrect with regard to ortho and para
- Fish die in water bodies polluted by sewage due to
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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