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Redox Reactions question

2022 · Q117
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Redox Reactions question

2022 · Q117

NEETChemistryRedox ReactionsMCQ+4 / −1

Which of the following reactions is a decomposition redox reaction?

  1. A
    P4(s) + 3OH−-−(aq) + 3H2O(l) →\to→ PH3(g) + 3H2PO2−_2^ -2−​(aq)
  2. B
    2Pb(NO3)2(s) →\to→ 2PbO(s) + 4NO2(g) + O2(g)
  3. C
    N2(g) + O2(g) →\to→ 2NO(g)
  4. D
    Cl2(g) + 2OH−-−(aq) →\to→ ClO−-−(aq) + Cl−-−(aq) + 4H2O(l)
View written solutionFree

Correct answer: B

Decomposition redox reaction leads to breakdown of a compound into two or more compounds at least one of which must be in the elemental state with change in oxidation number.

$$\mathrm{2Pb{\left( {N\mathop {{O_3}}\limits^{2 - } } \right)_2}(s) \to 2PbO(s) + 4N{O_2}(g) + \mathop {{O_2}}\limits^0 (g)}$$

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