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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: - The values of heat of formation of SO₂ and SO₃ are -298.2 kJ and -98.2 kJ.
- A hydrocarbon contains 20% hydrogen and 80% carbon.The empirical formula is
- Cation and anion combines in a crystal to form following types of compound
- Pyridine is less basic than triethylamine because
- Chromium has the most stable oxidation state
Topics: P Block Elements in Group 15
(89)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The values of heat of formation of SO₂ and SO₃ are -298.2 kJ and -98.2 kJ.
- A hydrocarbon contains 20% hydrogen and 80% carbon.The empirical formula is
- Cation and anion combines in a crystal to form following types of compound
- Pyridine is less basic than triethylamine because
- Chromium has the most stable oxidation state
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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