JAMB 2019 Chemistry · Question 49

Which important nitrogen-containing compound is produced in Haber's process?

Options

  1. A.NH3_3
  2. B.NO2_2
  3. C.NO
  4. D.HNO3_3

Answer: A. NH3_3

Explanation written with AI and checked against the answer key

Analysis

The question asks for the specific nitrogen-containing compound synthesized during the industrial process known as the Haber process.

Concept Explanation

The Haber process (also known as the Haber-Bosch process) is the primary industrial method used to produce ammonia (NH3NH_3).

In this process, nitrogen gas (N2N_2) from the air is reacted with hydrogen gas (H2H_2) under specific conditions:

  • Temperature: About 400°C – 450°C.
  • Pressure: High pressure, typically 200 atmospheres.
  • Catalyst: Finely divided iron.

The chemical equation for the reaction is:

N2(g)+3H2(g)⇌2NH3(g)N_{2(g)} + 3H_{2(g)} \rightleftharpoons 2NH_{3(g)}
Step-by-Step Solution
  1. Identify the reactants: The process uses Nitrogen (N2N_2) and Hydrogen (H2H_2).
  2. Identify the product: The reaction is designed to synthesize ammonia (NH3NH_3), which is a vital component in the production of fertilizers.
  3. Evaluate the options: • A. NH3NH_3 (Ammonia): This is the direct product of the Haber process. • B. NO2NO_2 (Nitrogen dioxide): This is typically produced in the Ostwald process or through the reaction of concentrated nitric acid. • C. NONO (Nitrogen monoxide): This is an intermediate in the Ostwald process. • D. HNO3HNO_3 (Nitric acid): This is produced via the Ostwald process, often using ammonia (the product of the Haber process) as a starting material.
Conclusion

Since the Haber process is specifically defined as the industrial synthesis of ammonia, the correct compound is NH3NH_3.

Exam Tip: Always distinguish between the Haber process (for Ammonia, NH3NH_3) and the Ostwald process (for Nitric acid, HNO3HNO_3). Students often confuse these two in exams!

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