Which of the following is a characteristic property of bases?

A. Sour taste

B. Reaction with metals to release water

C. Turn phenolphthalein pink

D. Donate protons

Answer Explanation:

One of the characteristic properties of bases is their ability to react with certain metals to release hydrogen gas. This reaction is not as common or vigorous as the reaction of acids with metals but is still a defining property of bases. An example of this reaction is the reaction between sodium hydroxide (\(NaOH\)) and aluminum (\(Al\)), which produces hydrogen gas (\(H_2\)).

Therefore, the Correct Answer is C.

Q #1: Which of the following properties is a characteristic of bases?

A. React with metals to release hydrogen gas

B. Turn litmus paper red

C. Have a sour taste

D. Conduct electricity in solution

Answer Explanation

Bases do not react with metals to release hydrogen gas. This property distinguishes them from acids, which do react with metals to produce hydrogen gas.
Q #2: Which of the following statements about the taste of bases is true?

A. Bases have a sweet taste

B. Bases have a bitter taste

C. Bases have a sour taste

D. Bases have no taste

Answer Explanation

Bases have a bitter taste. However, tasting chemicals is not safe and should never be done.
Q #3: Which of the following statements about the pH of bases is correct?

A. Bases have a pH greater than 7

B. Bases have a pH equal to 7

C. Bases have a pH less than 7

D. Bases have a pH of 7 and can vary based on concentration

Answer Explanation

Bases have a pH greater than 7 on the pH scale, indicating their alkaline nature. The pH of a base solution increases as the concentration of hydroxide ions (\(OH^-\)) increases.

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Which of the following is a characteristic property of bases?

More Questions on TEAS 7 Science

Q #1: Which of the following properties is a characteristic of bases?

Answer Explanation

Q #2: Which of the following statements about the taste of bases is true?

Answer Explanation

Q #3: Which of the following statements about the pH of bases is correct?

Answer Explanation

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