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1. What substance is used to bleach the brown syrup in the process of sugar manufacturing?
- A. CaCl₂
- B. CO₂
- C. CaCO₃
- D. SO₂

2. Which of the following is a renewable resource?
- A. Mineral
- B. Plant
- C. Petroleum
- D. Coal

3. Quartz glass is chiefly made of:
- A. Al₂SiO₆(OH)
- B. SiO₂
- C. B₂O₃
- D. CaSiO₃

4. The chemical name for quicklime is:
- A. Calcium carbonate
- B. Calcium sulphate
- C. Calcium hydroxide
- D. Calcium oxide

5. Which of the following is not a raw material in the manufacture of cement?
- A. Limestone
- B. Iron (II) oxide
- C. Pumice
- D. Soda ash

6. What process is carried out in the upper part of the kiln?
- A. Decomposition of limestone to calcium oxide
- B. Elimination of moisture
- C. Formation of calcium aluminate
- D. Formation of silicate

7. Which of the following is the major component of Portland cement?
- A. Sulphate trioxide
- B. Alumina
- C. Pure silica
- D. Calcium oxide

8. Which of the following is not a use of ammonia?
- A. Cleaning agent
- B. Cosmetics and skin care
- C. Fertilizers
- D. Antimicrobial agent

9. What is the name of the manufacturing process of nitric acid?
- A. Ostwald
- B. Contact
- C. Haber
- D. Castner-Kellner

10. What is the main importance of nitric acid?
- A. Soil acidification
- B. Explosive
- C. Rocket fuel
- D. Mineral fertilizer

11. What type of catalyst is used in the Ostwald process?
- A. Fe
- B. Pd
- C. Pt
- D. V₂O₅

12. Which of the following is the most basic nitrogen-based fertilizer?
- A. Anhydrous ammonia
- B. Urea phosphate
- C. Urea ammonium nitrate
- D. Diammonium monohydrogen

13. Which of the following nitrogen-based fertilizers is used as yeast in wine making and beer brewing?
- A. NH₃
- B. (NH₄)₂CO
- C. UAN
- D. DAP

14. Which of the following is not true about sulphuric acid?
- A. Soluble in all ratios with water
- B. Dehydrating agent
- C. Dissolution of H₂SO₄ in water is endothermic
- D. Strong oxidizing agent

Answer :

Here are the answers to the questions:

  1. What substance is used to bleach the brown syrup in the process of sugar manufacturing?

    • The correct answer is D. SO₂. Sulfur dioxide (SO₂) is used in the sugar industry to bleach and purify the sugar by removing color impurities.

  2. Which of the following is a renewable resource?

    • The correct answer is B. Plant. Plants are considered renewable resources because they can be regrown and replenished over time.

  3. Quartz glass is chiefly made of:

    • The correct answer is B. SiO₂. Quartz glass is primarily composed of silicon dioxide (SiO₂).

  4. The chemical name for quicklime is:

    • The correct answer is D. Calcium oxide. Quicklime is the common name for calcium oxide.

  5. Which of the following is not a raw material in the manufacture of cement?

    • The correct answer is D. Soda ash. Soda ash is not used in cement production. The raw materials include limestone, iron oxide, and clay.

  6. What process is carried out in the upper part of the kiln?

    • The correct answer is B. Elimination of moisture. In the upper part of the kiln, the materials are dried by removing moisture.

  7. Which of the following is the major component of Portland cement?

    • The correct answer is D. Calcium oxide. Calcium oxide is a major component in the formulation of Portland cement.

  8. Which of the following is not a use of ammonia?

    • The correct answer is B. Cosmetics and skin care. Ammonia is typically not used in cosmetics and skin care products.

  9. What is the name of the manufacturing process of nitric acid?

    • The correct answer is A. Ostwald. The Ostwald process is the industrial method used to produce nitric acid.

  10. What is the main importance of nitric acid?

  • The correct answer is D. Mineral fertilizer. Nitric acid plays a crucial role in the production of fertilizers, specifically in providing nitrogen in forms easily absorbed by plants.

  1. What type of catalyst is used in the Ostwald process?

  • The correct answer is C. Pt. Platinum (Pt) is used as a catalyst in the Ostwald process.

  1. Which of the following is the most basic nitrogen-based fertilizer?

  • The correct answer is A. Anhydrous ammonia. Anhydrous ammonia is widely used as a basic nitrogen-rich fertilizer.

  1. Which of the following nitrogen-based fertilizers is used as yeast in wine making and beer brewing?

  • The correct answer is D. DAP. Diammonium phosphate (DAP) is often used to provide nitrogen and phosphorus for yeast in fermentation processes.

  1. Which of the following is not true about sulphuric acid?

  • The correct answer is C. Dissolution of H₂SO₄ in water is endothermic. This is false because the dissolution of sulfuric acid in water is exothermic, releasing heat.

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