According to Brønsted-Lowry theory, which of the following species can act as both an acid and a base?

A HCl

B NH₃

C H₂O

D NaOH

✓ Correct Answer: Option C

Water (H₂O) is amphiprotic, meaning it can donate a proton (act as an acid, forming OH⁻) or accept a proton (act as a base, forming H₃O⁺), consistent with the Brønsted-Lowry definition.

💡 Why is C) the correct answer?

The correct answer to the question "According to Brønsted-Lowry theory, which of the following species can act as both an acid and a base?" is Option C: H₂O.

The other options — A) HCl, B) NH₃, D) NaOH — are incorrect for this Everyday Science question. As explained above: Water (H₂O) is amphiprotic, meaning it can donate a proton (act as an acid, forming OH⁻) or accept a proton (act as a base, forming H₃O⁺), consistent with the Brønsted-Lowry definition.

📚 About This Everyday Science Practice Question

This 3-level Everyday Science question from the Chemistry - Elements & Compounds topic is part of One Paper Preparation's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free Everyday Science practice test or use flashcards for spaced repetition review.

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According to Brønsted-Lowry theory, which of the following species can act as both an acid and a base?

✓ Correct Answer: Option C

📚 About This Everyday Science Practice Question

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