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.

Therefore, the Correct Answer is D.

Q #1: 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 #2: 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.
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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Which of the following metals will not react with hydrochloric acid (HCl)?

More Questions on TEAS 7 Science

Q #1: Which of the following statements about strong acids is true?

Answer Explanation

Q #2: Which of the following is not a property of acids?

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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