What effect do acids have on indicators like litmus paper?

A. Turn it blue

B. Turn it red

C. Turn it green

D. No effect

Answer Explanation:

Acids turn litmus paper red. Litmus is a common indicator that changes color in response to the acidity or basicity of a solution. In the presence of an acid, litmus paper turns red.

Therefore, the Correct Answer is B.

Q #1: What happens to the conductivity of a weak acid solution as it becomes more diluted?

A. Conductivity increases

B. Conductivity decreases

C. Conductivity remains constant

D. It depends on the acid

Answer Explanation

As a weak acid solution becomes more diluted, the concentration of ions decreases, leading to a decrease in conductivity. Weak acids only partially ionize in solution, resulting in fewer ions available to conduct electricity.
Q #2: Which of the following statements about the taste of acids is true?

A. Acids have a sweet taste

B. Acids have a bitter taste

C. Acids have a sour taste

D. Acids have no taste

Answer Explanation

Acids have a sour taste. This is one of their characteristic properties, though tasting chemicals is not safe and should never be done.
Q #3: How does the pH of an acidic solution compare to that of a neutral solution?

A. The pH of an acidic solution is lower than that of a neutral solution

B. The pH of an acidic solution is higher than that of a neutral solution

C. The pH of an acidic solution is the same as that of a neutral solution

D. The pH of an acidic solution is unpredictable

Answer Explanation

The pH scale ranges from 0 to 14, where pH values less than 7 indicate acidic solutions. Therefore, the pH of an acidic solution is lower than that of a neutral solution, which has a pH of 7.

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What effect do acids have on indicators like litmus paper?

More Questions on TEAS 7 Science

Q #1: What happens to the conductivity of a weak acid solution as it becomes more diluted?

Answer Explanation

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

Answer Explanation

Q #3: How does the pH of an acidic solution compare to that of a neutral solution?

Answer Explanation

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