How do bases affect 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 natural dye that changes color depending on the acidity or basicity of the solution it is in. In the presence of a base, litmus paper turns blue, indicating a basic solution.

Therefore, the Correct Answer is A.

Q #1: How do bases affect 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 natural dye that changes color depending on the acidity or basicity of the solution it is in. In the presence of a base, litmus paper turns blue, indicating a basic solution.
Q #2: What is the definition of an acid?

A. A substance that donates protons

B. A substance that accepts protons

C. A substance with a pH less than 7

D. A substance with a bitter taste

Answer Explanation

Acids are substances that can donate protons (\(H^+\)) to other substances. This is also known as the Arrhenius definition of acids. Examples of acids include hydrochloric acid (\(HCl\)) and sulfuric acid (\(H_2SO_4\)). When dissolved in water, acids increase the concentration of \(H^+\) ions.Acids are substances that can donate protons (\(H^+\)) to other substances. This is also known as the Arrhenius definition of acids. Examples of acids include hydrochloric acid (\(HCl\)) and sulfuric acid (\(H_2SO_4\)). When dissolved in water, acids increase the concentration of \(H^+\) ions.
Q #3: What property of acids gives them their sour taste?

A. Effect on indicators

B. Reaction with metals

C. Reaction with bases

D. Sour taste

Answer Explanation

Acids have a sour taste, which is one of their characteristic properties. This taste is primarily due to the presence of \(H^+\) ions. However, it's essential to note that tasting chemicals is not safe and should never be done, as many acids are corrosive and can cause harm.

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How do bases affect indicators like litmus paper?

More Questions on TEAS 7 Science

Q #1: How do bases affect indicators like litmus paper?

Answer Explanation

Q #2: What is the definition of an acid?

Answer Explanation

Q #3: What property of acids gives them their sour taste?

Answer Explanation

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