Free Haber's Process MCQs with Answers
18 Haber's Process MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Haber's process produces ammonia by reacting nitrogen with hydrogen in a reversible, exothermic equilibrium. The topic covers the iron catalyst, operating temperature and pressure, Le Chatelier's principle, the compromise between reaction rate and equilibrium yield, and the removal and recycling of ammonia and unreacted gases.
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18 questions
- A. finely divided iron with promoters
- B. platinum
- C. vanadium pentoxide
- D. nickel
Explanation: Iron with small amounts of potassium and aluminium oxide as promoters is used because it is effective and cheap enough for a process…
Correct answer: finely divided iron with promoters- A. 1000 degrees Celsius and 1 atmosphere
- B. 25 degrees Celsius and 1000 atmospheres
- C. 450 degrees Celsius and 200 atmospheres
- D. 450 degrees Celsius and 1 atmosphere
Explanation: A moderately high temperature is a compromise, since a low temperature would give a better yield but far too slowly for industry, while…
Correct answer: 450 degrees Celsius and 200 atmospheres- A. Pt
- B. ZnO + Cr2O3
- C. Fe in fused mixture of Al2O3 + SiQ2 + MgO
- D. All of the above
Explanation: The Haber process uses finely divided iron as the catalyst, with metal oxides acting as promoters to improve its activity and stability.
Correct answer: Fe in fused mixture of Al2O3 + SiQ2 + MgO- A. Kc=x2/(a-x)(b-x)
- B. Kc=x2/v(a-x)
- C. Kc=4×2/(a-2x)2(b-x)
- D. Kc=4x2v2/(a-x)(b-3x)3
Explanation: For N2 + 3H2 ⇌ 2NH3, if the initial amounts are a mol of N2 and b mol of H2, and x mol of N2 reacts in a vessel of volume v dm3, the…
Correct answer: Kc=4x2v2/(a-x)(b-3x)3- A. Fe2O3
- B. V2O5
- C. SO3
- D. Ag2O
Explanation: The Contact Process uses vanadium(V) oxide, V2O5, as the catalyst for oxidising SO2 to SO3.
Correct answer: V2O5- A. Better yield
- B. Lower yield
- C. Lower rate
- D. Cost decrease
Explanation: Explanation for this question will be added soon.
Correct answer: Better yield- A. Endothermic reaction
- B. Exothermic reaction
- C. Irreversible reaction
- D. Slow reaction
Explanation: Bond-making itself is an exothermic process because to make the bonds, heat energy is given off when compounds come closer, which makes…
Correct answer: Exothermic reaction- A. Endothermic reaction
- B. Exothermic reaction
- C. Irreversible
- D. Slow
Explanation: In the Haber process, "the atmospheric nitrogen (N2) is converted to ammonia (NH3) by reacting it with hydrogen (H2)".
Correct answer: Exothermic reaction- A. Solid state
- B. Liquid state
- C. Gaseous state
- D. None of these options are correct
Explanation: The Haber Process combines nitrogen from the air with hydrogen to form ammonia.
Correct answer: Liquid state- A. 30%
- B. 32%
- C. 35%
- D. 33%
Explanation: Remember that in Haber's process, the volume percentage of ammonia in the equilibrium mixture is 35%.
Correct answer: 35%- A. Endothermic
- B. Exothermic
- C. Irreversible
- D. Slow
Explanation: The change in enthalpy of Haber process is negative and there is a release of energy upon completion, therefore, it is "exothermic" and…
Correct answer: Exothermic- A. Law of Mass Action
- B. Catalyst
- C. Le chatelier's Principle
- D. All of these
Explanation: Le Chatelier's principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts…
Correct answer: Le chatelier's Principle- A. Iron
- B. Carbon
- C. Copper
- D. Silver
Explanation: An iron catalyst is used in the Haber process because iron is durable, cheap, and effective at catalysis.
Correct answer: Iron14. Which one of the following is the correct chemical reaction for Ammonia formationby Haber process?
- A. N2(g) + H2(g) ⇌ 2NH(g)
- B. 2N(g) + 3H2(g) ⇌ NH3(g)
- C. 2N(g) + 3H2(g) ⇌ 2NH3(g)
- D. N2(g) + 3H2(g) ⇌ 2NH3(g)
Explanation: Below is the true reaction of haber's process:N2(g) + 3H2(g) = 2NH3(g)It is a fact and should be memorized.
Correct answer: N2(g) + 3H2(g) ⇌ 2NH3(g)- A. Standard
- B. Normal
- C. Cool
- D. Harsh
Explanation: Nitrogen gas is a molecule with a triple bond between the atoms, which makes Nitrogen unreactive under normal conditions as it takes a lot…
Correct answer: Harsh- A. 46%
- B. 82%
- C. 14%
- D. 17%
Explanation: The Mr of Ammonia (NH3) is 14+3=17It contains ammonia in the percentage of :14/17 x 100 = 82%
Correct answer: 82%- A. 3N2 (g) + 3H2 (g) <=====> 2NH3 (g)
- B. N2 (g) + H2 (g) <=====> NH3 (g)
- C. 3N2 (g) + H2 (g) <=====> 2NH3 (g)
- D. N2 (g) + 3H2 (g) <=====> 2NH3 (g)
Explanation: Ammonia is synthesized in a process called Haber Process by Nitrogen (N2) and Hydrogen (H2) First of all, write the chemical equation for…
Correct answer: N2 (g) + 3H2 (g) <=====> 2NH3 (g)- A. Very difficult step
- B. Highly unstable product
- C. Highly endothermic
- D. None of the above
Explanation: The Haber process involves the synthesis of ammonia (NH3) from nitrogen (N2) and hydrogen (H2) gases.
Correct answer: Highly endothermicHaber's Process MCQs: common questions
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