Which is strongest acid?
Correct answer: D. HClO4
- A. HClO
- B. HClO2
- C. HClO3
- D. HClO4
Explanation
HClO4 (perchloric acid): This acid is the strongest among the options. It is a highly corrosive and reactive acid. Perchloric acid is a strong oxidizing agent and is used in laboratories for various purposes. Therefore, the correct answer is "HClO4" (perchloric acid) as it is the strongest acid among the given options.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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About Bronsted-Lowry and Lewis Concepts
The Brønsted-Lowry concept defines acids as proton donors and bases as proton acceptors, producing conjugate acid-base pairs. The Lewis concept extends the idea to electron-pair acceptors and donors, so compounds such as BF3 and NH3 can be treated as acid and base even without proton transfer, unlike the Arrhenius definition.
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