Sum of \(\pi\)-bonds present in peroxodisulphuric acid and pyrosulphuric acid is___________
Sum of \(\pi\)-bonds present in peroxodisulphuric acid and pyrosulphuric acid is___________
Show Hint
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 = \(4 + 4 = 8\).
Top Questions on p -Block Elements
- $\textbf{Choose the correct statements about the hydrides of group 15 elements.}$
A. The stability of the hydrides decreases in the order \(\text{NH}_3 > \text{PH}_3 > \text{AsH}_3 > \text{SbH}_3 > \text{BiH}_3\)
B. The reducing ability of the hydrides increases in the order \(\text{NH}_3 < \text{PH}_3 < \text{AsH}_3 < \text{SbH}_3 < \text{BiH}_3\)
C. Among the hydrides, \(\text{NH}_3\) is a strong reducing agent while \(\text{BiH}_3\) is a mild reducing agent.
D. The basicity of the hydrides increases in the order \(\text{NH}_3 < \text{PH}_3 < \text{AsH}_3 < \text{SbH}_3 < \text{BiH}_3\)
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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.
- P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.
P block elements consist of:
- Group 13 Elements: Boron family
- 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