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Praxis II General Science

Category - Chemistry

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Which of the following can be used to determine the pH of a solution?

I. Methyl orange indicator
II. Litmus paper
III. pH probe

I only.
II only.
I and II.
I, II, and III.
III only.

Explanation

Answer: D - Both litmus paper and a pH probe can be used to determine the pH of a solution. Litmus paper contains a mixture of dyes that react to changes in pH. Methyl orange is another pH indicator that is used in titrations to determine the content of acid in a solution.

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