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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 number of gram molecules of oxygen in 6.02 x 10²⁴ CO molecules is
- Fine the magnetic moment of a divalent ion in aqueous solution if its atomic
- Boron is unable to form BF₆³⁻ because of
- Which of the following is not efflorescent?
- Permanent hardness of water is due to the presence of
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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