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: 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.
Q #2: How does the reaction of an acid with a base affect the pH of the resulting solution?

A. The pH increases

B. The pH decreases

C. The pH remains unchanged

D. It depends on the specific acid and base

Answer Explanation

When an acid reacts with a base in a neutralization reaction, the pH of the resulting solution remains unchanged if the quantities of acid and base are stoichiometrically balanced. This is because the \(H^+\) ions from the acid react with the \(OH^-\) ions from the base to form water, effectively neutralizing each other.
Q #3: 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.

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Which of the following metals will not react with hydrochloric acid (HCl)?

More Questions on TEAS 7 Science

Q #1: How does the pH of an acidic solution compare to that of a neutral solution?

Answer Explanation

Q #2: How does the reaction of an acid with a base affect the pH of the resulting solution?

Answer Explanation

Q #3: Which of the following is not a property of acids?

Answer Explanation

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