Which is the strongest acid?
Correct answer: D. HClO4 (Perchloric acid)
- A. HClO (Hypochlorous acid)
- B. HClO2 (Chlorous acid)
- C. HClO3 (Chloric acid)
- D. HClO4 (Perchloric acid)
Explanation
Strength of Oxyacids of Chlorine:The strength of oxyacids of chlorine generally increases as the number of oxygen atoms attached to the chlorine atom increases. This is due to the electronegativity of oxygen atoms, which pull electron density away from the chlorine atom, making it more acidic.Order of Acid Strength:HClO < HClO2 < HClO3 < HClO4 (weakest to strongest)Reasoning for HClO4's Strength:HClO4 has four oxygen atoms, which create a highly electron-withdrawing environment around the chlorine atom. This significantly weakens the O-H bond, making it easier for HClO4 to release H+ ions in solution, thus acting as a strong acid.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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