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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
- All Cu(II) halides are known except the iodide. The reason for it is that
- Which kind of isomerism is exhibited by octahedral [Co(NH₃)₄Br₂]Cl
- A bivalent metal has the equivalent weight of 12. The molecular weight
- Specific conductance of 0.1 M nitric acid is 6.3 ˣ 10⁻² ohm⁻¹ cm⁻¹.
- N₂ gas will not be evolved upon reaction of HNO₂ with which of the following
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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