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.

Therefore, the Correct Answer is D.

Q #1: What effect do bases have on indicators like litmus paper?

A. Turn it blue

B. Turn it red

C. Turn it green

D. No effect

Answer Explanation

Bases turn litmus paper blue. Litmus is a common indicator that changes color in response to the acidity or basicity of a solution. In the presence of a base, litmus paper turns blue.
Q #2: How do bases affect the solubility of certain substances, such as fats and oils?

A. Bases decrease the solubility

B. Bases increase the solubility

C. Bases have no effect on solubility

D. It depends on the specific substance

Answer Explanation

Bases increase the solubility of certain substances like fats and oils. This property is utilized in the process of saponification, where bases (such as sodium hydroxide) react with fats to produce soap and glycerol.
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 properties is a characteristic of bases?

More Questions on TEAS 7 Science

Q #1: What effect do bases have on indicators like litmus paper?

Answer Explanation

Q #2: How do bases affect the solubility of certain substances, such as fats and oils?

Answer Explanation

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

Answer Explanation

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