Acids, Bases and Salts - Real World Applications
Q. What is the pH range of a neutral solution at 25°C?
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A.
0-7
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B.
7-14
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C.
7
-
D.
14
Solution
A neutral solution has a pH of 7 at 25°C, indicating equal concentrations of hydrogen and hydroxide ions.
Correct Answer: C — 7
Q. What is the primary function of baking soda in baking?
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A.
Leavening agent
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B.
Flavor enhancer
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C.
Preservative
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D.
Coloring agent
Solution
Baking soda, or sodium bicarbonate, acts as a leavening agent by producing carbon dioxide when it reacts with acids.
Correct Answer: A — Leavening agent
Q. What is the primary use of hydrochloric acid in the food industry?
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A.
Flavoring agent
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B.
Preservative
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C.
pH control
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D.
Coloring agent
Solution
Hydrochloric acid is used to control pH levels in food processing, ensuring safety and quality.
Correct Answer: C — pH control
Q. Which acid is commonly used in the production of fertilizers?
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A.
Phosphoric acid
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B.
Sulfuric acid
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C.
Nitric acid
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D.
Acetic acid
Solution
Sulfuric acid is used in the production of phosphate fertilizers, which are essential for plant growth.
Correct Answer: B — Sulfuric acid
Q. Which of the following acids is commonly used in car batteries?
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A.
Sulfuric acid
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B.
Hydrochloric acid
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C.
Nitric acid
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D.
Acetic acid
Solution
Sulfuric acid is the primary acid used in lead-acid batteries, which are commonly found in cars.
Correct Answer: A — Sulfuric acid
Q. Which of the following is a common application of sodium bicarbonate in medicine?
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A.
Antacid
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B.
Antibiotic
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C.
Analgesic
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D.
Antihistamine
Solution
Sodium bicarbonate is commonly used as an antacid to relieve heartburn and indigestion by neutralizing stomach acid.
Correct Answer: A — Antacid
Q. Which of the following is a strong base commonly used in household cleaning products?
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A.
Sodium bicarbonate
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B.
Ammonium hydroxide
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C.
Sodium hydroxide
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D.
Calcium carbonate
Solution
Sodium hydroxide is a strong base that is often used in drain cleaners and other cleaning products.
Correct Answer: C — Sodium hydroxide
Q. Which of the following salts is commonly used as a food preservative?
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A.
Sodium chloride
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B.
Potassium nitrate
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C.
Calcium sulfate
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D.
Magnesium sulfate
Solution
Sodium chloride, or table salt, is widely used as a preservative in various food products.
Correct Answer: A — Sodium chloride
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