NEET2022Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual
Which of the following reactions is a part of the large scale industrial preparation of nitric acid?
Options
- ANaNO ₃+ H ₂ SO ₄ Pt 500 ~K , 9 bar NaHSO ₄ + HNO ₃
- B4 NH ₃+5 O ₂ (from air) Pt 500 ~K , 9 bar 4 NO + 6 H ₂ O
- C4 HPO ₃+2 ~N ₂ O ₅ Pt 500 ~K , 9 bar 4 HNO ₃ + P ₄ O ₁₀
- DCu ( NO ₃ )₂+2 NO ₂+2 H ₂ O 500 Pt , 9 bar ba 4 HNO ₃+ Cu
Correct answer
B. 4 NH ₃+5 O ₂ (from air) Pt 500 ~K , 9 bar 4 NO + 6 H ₂ O
Step-by-step solution
The balanced chemical equation involved in manufacturing of ( HNO ₃ ) by Ostwald's process are shown as: Step 1 Formation of nitric oxide (NO) (4 NH ₃( ~g )+5 O ₂( ~g ) [500 ~K , 9 bar ] Pt / Rh , gases- catalyst 4 NO ( g )+6 H ₂ O ) Step 2 Formation of nitrogen dioxide ( ( NO ₂ ) ) (2 NO ( g )+ O ₂( g ) 2 NO ₂( ~g ) ) Step 3 Absorption of ( NO ₂ ) (Formation of ( HNO ₃ ) ) (3 NO ₂( ~g )+ H ₂ O 2 HNO ₃( I )+ NO ( g ) )