When conc. H₂SO₄ is added to dry KNO₃,brown fumes are evolved.These fumes are

When Conc Hso Is Added To Dry Kno Brown Fumes Chemistry Question

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:

  1. In the formation of N₂⁺from N₂, the electron is lost from
  2. Which reagent can be used for the alkylation of aromatic nitro compounds
  3. Aluminium deposited vapours on glass forms a good mirror essentially because
  4. The coordination number and oxidation number of X in the following compound [X(SO₄)(NH₃)₅]Cl
  5. The correct order of increasing bond length of C–H, C–O, C–C and C=C is

Topics: P Block Elements in Group 15 (89)
Subject: Chemistry (2512)

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