Oxidation states of $P$ in $ H_4 \, P_2 \, O_5, H_4, P_2, O_6 , H_4 P_2 O_7 $ respectively are

Key Idea Oxidation state of H is + 1 and that of O is - 2. Let the oxidation state of P in the given compounds isx. In $ H_4 P_2 O_5 $ $ ( + 1) \times 4 + 2 \times x + ( - 2) \times 5 = 0 $ $4 + 2x - 10 = 0$ $2x = 8$ $\therefore$ $ x = + 4$ In $ H_4 P_2 O_7$ $ ( + 1 ) \times 4 + 2 \times x + ( - 2) \times 7 = 0 $ $4 + 2x - 14 = 0$ $2x = 10$ $\therefore$ $ x = + 5$ Thus, the oxidation states of $P$ in $ H_4 P_2 O_6, \, H_4 P_2 O_6 $ and $ H_4 P_2 O_7 $ are $+3, + 4$ and $+5$ respectively

Oxidation states of $P$ in $ H_4 \, P_2 \, O_5, H

Top Questions on p -Block Elements

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$\textbf{Choose the correct statements about the hydrides of group 15 elements.}$
A. The stability of the hydrides decreases in the order $\text{NH}_3 > \text{PH}_3 > \text{AsH}_3 > \text{SbH}_3 > \text{BiH}_3$
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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 $\text{NH}_3 < \text{PH}_3 < \text{AsH}_3 < \text{SbH}_3 < \text{BiH}_3$
Choose the most appropriate from the option given below:
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\[ \begin{array}{ccc} \text{ClO}_4^- & \text{IO}_4^- & \text{BrO}_4^- \\ E^\circ = 1.19 \, \text{V} & E^\circ = 1.65 \, \text{V} & E^\circ = 1.74 \, \text{V} \\ \end{array} \]
The correct order of their oxidising power is:
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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

List-I (Conversion)		List-II (Shape/geometry)
(A)	1 mol of H₂O to O₂	(I)	3F
(B)	1 mol of MnO^-₄ to Mn²⁺	(II)	2F
(C)	1.5 mol of Ca from molten CaCl₂	(III)	1F
(D)	1 mol of FeO to Fe₂O₃	(IV)	5F