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P Block Elements question

2022 · Q104
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P Block Elements question

2022 · Q104

NEETChemistryP Block ElementsMCQ+4 / −1

Which of the following reactions is a part of the large scale industrial preparation of nitric acid?

  1. A
    Cu(NO3)2 + 2NO2 + 2H2O ⟶500 K, 9 barPt\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}}500K,9bar⟶Pt​ 4HNO3 + Cu
  2. B
    NaNO3 + H2SO4 ⟶500 K, 9 barPt\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}}500K,9bar⟶Pt​ NaHSO4 + HNO3
  3. C
    4NH3 + 5O2 (from air) ⟶500 K, 9 barPt\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}}500K,9bar⟶Pt​ 4NO + 6H2O
  4. D
    4HPO3 + 2N2O5 ⟶500 K, 9 barPt\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}}500K,9bar⟶Pt​ 4HNO3 + P4O10
View written solutionFree

Correct answer: C

4NH3 + 5O2 (from air) $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}} $$ 4NO + 6H2O

2NO(g) + O2(g) $\rightleftharpoons$ 2NO2(g)

3NO2(g) + H2O(l) $\to$ 2HNO3(aq) + NO(g)

This is industrial method of preparation of nitric acid.

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