Kit Library / Science / Chemistry

⚡ Topic Learning Kit

Acids & Bases

English 15 leveled MCQs Free

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1

Acids and Bases: Properties and Reactions

~8 min · full explanation, examples & memory tricks in the app

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15 questions laddered from warm-up to topper-level, each with an explanation. A taste:

Which of the following is a characteristic property of acids?

Beginner
A They react with metals to produce hydrogen gas. B They feel slippery. C They turn blue litmus red. D They taste bitter.
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They turn blue litmus red.

Acids turn blue litmus paper red, which is a common test for acidity. Bitter taste and slippery feel are properties of bases, and while acids do react with metals to produce hydrogen gas, that is not the most characteristic simple property listed here.

Which of the following is a property of bases?

Beginner
A They have a pH less than 7. B They taste sour. C They turn red litmus blue. D They react with carbonates to produce carbon dioxide.
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They turn red litmus blue.

Bases turn red litmus paper blue. Sour taste is characteristic of acids, reaction with carbonates to produce carbon dioxide is a property of acids, and pH less than 7 indicates acidity.

What is the pH range of acidic solutions?

Beginner
A Exactly 7 B Below 7 C 7 to 14 D 0 to 7
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Below 7

Acidic solutions have a pH less than 7. A pH of exactly 7 is neutral, and pH greater than 7 indicates basicity.

Which ion is responsible for the acidic properties of a solution?

Intermediate
A Chloride ion (Cl⁻) B Hydrogen ion (H⁺) C Hydroxide ion (OH⁻) D Sodium ion (Na⁺)
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Hydrogen ion (H⁺)

Acids release hydrogen ions (H⁺) in solution, which are responsible for their acidic properties. Hydroxide ions are responsible for basic properties.

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