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When conc. H₂SO₄ is added to dry KNO₃, brown fumes are evolved. These fumes are of
Options
(a) SO₂
(b) SO₃
(c) NO
(d) NO₂
Correct Answer:
NO₂
Explanation:
When heated with conc. H₂SO₄ potassium nitrate undergoes double decomposition reaction forming free nitric acid. Some of the nitric acid gets decomposed to give brown fumes of nitrogen dioxide. KNO₃ + H₂SO₄ → KHSO₄ + HNO₃. 4HNO₃ → 4NO₂ + 2H₂O + O₂.
Related Questions: - When 25g of Na₂SO₄ is dissolved in 10³ kg of solution,its concentration will be
- Acetaldehyde can not show
- When x g of magnesium burnt with oxygen what is left
- The normality of solution containing 31.5g of hydrated oxalic acid (H₂C₂O₄.2H₂O)
- The volume of water to be added to N/2 HCl to prepare 500 cm³ of N/10 solution is
Topics: P Block Elements in Group 15
(89)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When 25g of Na₂SO₄ is dissolved in 10³ kg of solution,its concentration will be
- Acetaldehyde can not show
- When x g of magnesium burnt with oxygen what is left
- The normality of solution containing 31.5g of hydrated oxalic acid (H₂C₂O₄.2H₂O)
- The volume of water to be added to N/2 HCl to prepare 500 cm³ of N/10 solution is
Topics: P Block Elements in Group 15 (89)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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