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Which of the following is not a property of acids?

A. React with bases to form salts

B. Turn litmus paper blue

C. Have a sour taste

D. Conduct electricity in solution

Answer Explanation:

Acids turn litmus paper red, not blue. This property distinguishes them from bases, which turn litmus paper blue.

Therefore, the Correct Answer is B.

Q #1: Which of the following metals will not react with hydrochloric acid (HCl)?

A. Iron (Fe)

B. Magnesium (Mg)

C. Zinc (Zn)

D. Gold (Au)

Answer Explanation

Gold (Au) is a noble metal and does not react with hydrochloric acid (HCl). Iron, magnesium, and zinc are reactive metals that can undergo displacement reactions with hydrochloric acid to produce hydrogen gas.
Q #2: Which of the following statements about strong acids is true?

A. They have a low dissociation constant (Ka)

B. They completely dissociate in solution

C. They are poor conductors of electricity

D. They have a pH greater than 7

Answer Explanation

Strong acids completely dissociate into ions when dissolved in water, resulting in a high concentration of \(H^+\) ions in solution. This complete ionization distinguishes them from weak acids.
Q #3: 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.

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