Sum of \(\pi\)-bonds present in peroxodisulphuric acid and pyrosulphuric acid is___________
Sum of \(\pi\)-bonds present in peroxodisulphuric acid and pyrosulphuric acid is___________
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Count π-bonds in double bonds (C=O, S=O, etc.) while analyzing structures of acids.
Correct Answer: 8
Solution and Explanation
• Peroxodisulphuric acid: Structure: \[ H - O - S(=O)_2 - O - O - S(=O)_2 - O - H \] Number of \(\pi\)-bonds = 4 (two in each \(\text{SO}_3\) group)
• Pyrosulphuric acid: Structure: \[ H - O - S(=O)_2 - O - S(=O)_2 - O - H \] Number of \(\pi\)-bonds = 4 (two in each \(\text{SO}_3\) group).
Total \(\pi\)-bonds = \(4 + 4 = 8\).
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\[ \begin{array}{ccc} \text{ClO}_4^- & \text{IO}_4^- & \text{BrO}_4^- \\ E^\circ = 1.19 \, \text{V} & E^\circ = 1.65 \, \text{V} & E^\circ = 1.74 \, \text{V} \\ \end{array} \]
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Statement II: Nitrogen does not form halides with +5 oxidation state due to the absence of d-orbital in it.
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Concepts Used:
P-Block Elements
- P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
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P block elements consist of:
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- Group 14 Elements: Carbon family
- Group 15 Elements: Nitrogen family
- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family