Manufactured Substances in Industry Practice Questions
SPM (Malaysia) · SPM Chemistry · 150 free MCQs with instant results and detailed explanations.
150
Total
45
Easy
75
Medium
30
Hard
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Sample Questions from Manufactured Substances in Industry
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Q1
Easy
Which of the following is a primary product of the Haber process?
A.
Ammonia
B.
Nitrogen dioxide
C.
Hydrogen
D.
Methane
Show Answer & Explanation
Correct Answer: A
The Haber process is specifically designed to synthesize ammonia from nitrogen and hydrogen gas. Hence, ammonia is the primary product.
Q2
Easy
What is the main use of sulfuric acid in the industry?
A.
Production of fertilizers
B.
Making soap
C.
Purifying water
D.
Extracting metals
Show Answer & Explanation
Correct Answer: A
Sulfuric acid is widely used in the production of fertilizers, particularly ammonium sulfate, making option A correct.
Q3
Easy
Which substance is commonly produced by the thermal decomposition of calcium carbonate?
A.
Calcium oxide
B.
Calcium hydroxide
C.
Carbon dioxide
D.
Calcium chloride
Show Answer & Explanation
Correct Answer: A
When calcium carbonate is thermally decomposed, it breaks down into calcium oxide and carbon dioxide. Thus, calcium oxide is the main product.
Q4
Medium
Which of the following is a primary raw material used in the production of ammonia through the Haber process?
A.
Nitrogen
B.
Carbon Dioxide
C.
Oxygen
D.
Hydrogen
Show Answer & Explanation
Correct Answer: A
Nitrogen is the primary raw material in the Haber process, which combines nitrogen from the air with hydrogen to produce ammonia.
Q5
Medium
When producing ethanol through fermentation, which of the following organisms is primarily used?
A.
Bacteria
B.
Yeast
C.
Mold
D.
Algae
Show Answer & Explanation
Correct Answer: B
Yeast is the microorganism primarily used in fermentation processes to convert sugars into ethanol and carbon dioxide.
Q6
Medium
What is the main product formed when sulfur dioxide is oxidized in the presence of a catalyst?
A.
Sulfuric acid
B.
Sulfur trioxide
C.
Sulfide
D.
Thiosulfate
Show Answer & Explanation
Correct Answer: B
Sulfur trioxide is the main product formed when sulfur dioxide is oxidized, often in the contact process for producing sulfuric acid.
Q7
Medium
In the production of chlorine gas via electrolysis, what is the electrolyte solution typically used?
A.
Sodium Chloride solution
B.
Potassium Hydroxide
C.
Sulfuric Acid
D.
Calcium Carbonate
Show Answer & Explanation
Correct Answer: A
Sodium chloride solution (brine) is typically used as the electrolyte in the electrolysis of saltwater to produce chlorine gas.
Q8
Hard
Which of the following reactions is primarily involved in the industrial production of ammonia through the Haber process?
A.
N2 + 3H2 ⇌ 2NH3
B.
CO + 2H2 ⇌ CH3OH
C.
4Fe + 3O2 → 2Fe2O3
D.
CaCO3 → CaO + CO2
Show Answer & Explanation
Correct Answer: A
The Haber process synthesizes ammonia (NH3) from nitrogen (N2) and hydrogen (H2) using the reaction N2 + 3H2 ⇌ 2NH3, which is critical for fertilizer production.
Q9
Hard
A certain industrial process uses sulfur dioxide (SO2) and oxygen (O2) to produce sulfur trioxide (SO3). If 100 moles of SO2 and 50 moles of O2 are mixed, what is the limiting reagent?
A.
SO2
B.
O2
C.
SO3
D.
No limiting reagent
Show Answer & Explanation
Correct Answer: B
In the reaction 2SO2 + O2 → 2SO3, you require 2 moles of SO2 for every mole of O2. 100 moles of SO2 would require 50 moles of O2, making O2 the limiting reagent since it will be used up first.
Q10
Hard
What is the primary chemical reaction involved in the Haber process for synthesizing ammonia?
A.
N2(g) + 3H2(g) ⇌ 2NH3(g)
B.
2NH3(g) ⇌ N2(g) + 3H2(g)
C.
N2(g) + H2(g) + O2(g) → NH3(g) + H2O(g)
D.
N2(g) + 3H2(g) → 2NH3(g) + energy
Show Answer & Explanation
Correct Answer: A
The Haber process directly synthesizes ammonia from nitrogen and hydrogen under high pressure and temperature with a catalyst, represented by the reaction N2(g) + 3H2(g) ⇌ 2NH3(g). This is the correct and balanced equation.
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Manufactured Substances in Industry — SPM (Malaysia) SPM Chemistry Practice Questions Online
This page contains 150 practice MCQs for the chapter Manufactured Substances in Industry in SPM (Malaysia) SPM Chemistry. The questions are organized by difficulty — 45 easy, 75 medium, 30 hard — so you can choose the right level for your preparation.
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