Study of Compounds – Sulphuric Acid Quiz - ICSE Class 10 Chemistry

Free practice quiz: Study of Compounds – Sulphuric Acid (ICSE Class 10 Chemistry). 41 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 10 Chemistry practice quiz has 41 multiple-choice questions on Study of Compounds – Sulphuric Acid, and 41 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is NOT a characteristic property of concentrated sulphuric acid?

   1. Dehydrating agent
   2. Oxidizing agent
   3. Non-volatile acid
   4. Reducing agent
   Show answer

   Answer: D. Reducing agent

   Concentrated sulfuric acid is a strong oxidizing agent and a dehydrating agent. It is also a non-volatile acid. It is not a reducing agent; in fact, it readily oxidizes many substances, acting as an oxidizing agent itself.

2. In the Contact Process, the reaction of sulfur dioxide with oxygen to form sulfur trioxide is reversible and exothermic. To maximize the yield of sulfur trioxide, which of the following conditions should be favored?

   1. High temperature, low pressure
   2. Low temperature, high pressure
   3. High temperature, high pressure
   4. Low temperature, low pressure
   Show answer

   Answer: B. Low temperature, high pressure

   The reaction 2SO₂ + O₂ ⇌ 2SO₃ is exothermic (releases heat). According to Le Chatelier's principle, lower temperatures favor the forward (exothermic) reaction, thus increasing the yield of SO₃. The forward reaction also involves a decrease in the number of moles of gas (3 moles of reactants to 2 moles of product). Higher pressure favors the reaction that reduces the number of moles of gas, thus increasing the yield of SO₃. However, a compromise temperature (around 400-450°C) is used to achieve a reasonable rate of reaction, as lower temperatures result in very slow reaction rates.

3. The primary use of sulfuric acid in the petroleum industry is:

   1. As a catalyst in cracking
   2. To remove impurities like unsaturated hydrocarbons
   3. To prevent corrosion of pipelines
   4. To produce lubricating oils
   Show answer

   Answer: B. To remove impurities like unsaturated hydrocarbons

   In the petroleum industry, concentrated sulfuric acid is used to remove impurities, particularly unsaturated hydrocarbons (alkenes and alkynes), from gasoline and other refined products. These impurities react with sulfuric acid and are removed as oily sludge.

4. Which of the following metals is NOT oxidized by dilute sulfuric acid?

   1. Zinc
   2. Iron
   3. Copper
   4. Magnesium
   Show answer

   Answer: C. Copper

   Dilute sulfuric acid, like other dilute non-oxidizing acids, reacts with metals that are more reactive than hydrogen in the electrochemical series to produce hydrogen gas and the corresponding metal sulfate. Zinc, iron, and magnesium are more reactive than hydrogen and will react. Copper is less reactive than hydrogen, so it does not react with dilute sulfuric acid. Copper reacts with concentrated sulfuric acid due to its oxidizing nature.

5. When concentrated sulfuric acid is heated with sulphur, the product formed is:

   1. SO₂
   2. SO₃
   3. H₂S₂O₇
   4. H₂S
   Show answer

   Answer: A. SO₂

   When sulfur is heated with concentrated sulfuric acid, the sulfuric acid acts as an oxidizing agent, oxidizing sulfur to sulfur dioxide. The reaction is: S + 2H₂SO₄ (conc.) → 3SO₂ + 2H₂O. SO₃ is not formed under these conditions; it's a product of oxidation of SO₂. H₂S₂O₇ is oleum, formed from SO₃ and H₂SO₄. H₂S is a reducing agent.

More questions in this quiz

Answers and explanations are in the full quiz.

1. When copper is heated with concentrated sulphuric acid, the products formed are:
2. The process of heating a substance in the presence of concentrated sulphuric acid to remove water is known as:
3. Which of the following is a major impurity found in industrial sulfuric acid manufactured by the Contact Process?
4. The catalyst used in the Contact Process for the manufacture of sulfuric acid is:
5. Sulfuric acid is used in the manufacture of fertilizers like ammonium sulphate. The reaction involved is:
6. Which of the following gases is produced when concentrated sulfuric acid reacts with potassium iodide?
7. The property of concentrated sulfuric acid that allows it to remove hydrogen and oxygen in the ratio 2:1 from organic compounds is:
8. Which of the following statements about oleum is INCORRECT?
9. Concentrated sulfuric acid reacts with carbon to produce:
10. Which allotrope of sulfur is primarily converted to sulfur dioxide in the Contact Process?
11. The reaction 2SO₂ (g) + O₂ (g) ⇌ 2SO₃ (g) is carried out in the presence of a catalyst. Which of the following statements about this reaction is correct?
12. Dilute sulfuric acid reacts with sodium hydroxide in a neutralization reaction. The products are:
13. When sulfur dioxide is passed through acidified potassium permanganate solution, the solution:
14. Which substance is NOT formed when iron pyrites (FeS₂) is roasted in air?
15. Which of the following oxides of sulfur is readily absorbed by concentrated sulfuric acid to form oleum?
16. Concentrated sulfuric acid reacts with formic acid (HCOOH) to produce:
17. The reaction of sulfur dioxide with water to form sulfurous acid is:
18. Which of the following is NOT a role of sulfuric acid in lead-acid batteries?
19. The chemical formula for the compound formed when sulfur dioxide dissolves in water and is then oxidized by a strong oxidizing agent to sulfuric acid is:
20. Which gas is passed through purified sulfur dioxide and air mixture in the Contact Process?
21. The reaction of sulfur trioxide with water produces:
22. The reaction of concentrated sulfuric acid with sodium chloride to produce hydrogen chloride gas involves:
23. In the Contact Process, the cooling of sulfur trioxide before absorbing it in sulfuric acid is essential because:
24. Which property of concentrated sulfuric acid allows it to be used as a drying agent for gases like H₂, CO₂, and O₂ (but not NH₃)?
25. When sulfur dioxide is passed through a solution of potassium dichromate acidified with sulfuric acid, the color change observed is:
26. The chemical formula of sodium bisulfate, formed when sulfuric acid reacts with one equivalent of sodium hydroxide, is:
27. Which of the following is a characteristic of dilute sulfuric acid but not concentrated sulfuric acid?
28. The main purpose of using a catalyst in the Contact Process is to:
29. The solubility of sulfur dioxide in water is related to the formation of:
30. Which of the following is a common use of sulfuric acid in the chemical industry as a reactant, not just as a catalyst or solvent?
31. The reaction of concentrated sulfuric acid with carbon monoxide is:
32. Which property of concentrated sulfuric acid is utilized when it is used to dry hydrogen chloride gas?
33. The blue color of copper sulfate solution fades when treated with concentrated sulfuric acid because:
34. In the Contact Process, the conversion of sulfur dioxide to sulfur trioxide occurs in converter units packed with catalyst. What is the typical temperature range maintained in these converters?
35. Which of the following compounds would react with dilute sulfuric acid to produce a gas that turns lime water milky?
36. The "contact" in the Contact Process for manufacturing sulfuric acid refers to:

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