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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.
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Topics: P Block Elements in Group 15
(89)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The volume of 3.0 N-H₂O₂ strength is
- If the enthalpy change for the transition of liquid water to steam
- Cynanide and reacts isocyanide are isomers of type
- A mixture of gases contains H₂ and O₂ gases in the ratio of 1:4(w/w).
- A drug which is sturcturally related to adrenaline 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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