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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.
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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
- The basicity of aniline is weaker in comparison to that of mathyl amine due to
- At when pressure will a quantity of gas, which occupies 100 mL at a pressure of 720 mm
- The correct order of ionisation energy for comparing carbon, nitrogen and oxygen
- What is the equivalent mass of IO₄⁻ when it is converted into I₂ in acid medium
- The number of structural isomers possible from the molecular formula C₃H₉N is
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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