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Question
Account for the following :
Acidic character decreases from N2O3 to Bi2O3 in group 15.
Solution
Acidic character of oxides of group 15 elements decreases and basicity increases down the group.
As we move down the group, the atomic size increases, electronegativity decreases and metallic character increases. Oxides of Nitrogen and phosphorous are acidic whereas those of As and Sb are amphoteric and that of Bismuth is basic.
RELATED QUESTIONS
Discuss the general characteristics of Group 15 elements with reference to their electronic configuration, oxidation state, atomic size, ionisation enthalpy and electronegativity.
Ionic radii (in Å) of As3+, Sb3+ and Bi3+ follow the order:
With respect to protonic acids, which of the following statement is correct?
The correct order of increasing oxidising power is:
H2S is more acidic than H2O because ____________.
The oxidation state of central atom in the anion of compound \[\ce{NaH2PO2}\] will be ______.
Match the items of Columns I and II and mark the correct option.
| Column I | Column II | |
| (A) | Its partial hydrolysis does not | (1) He |
| (B) | It is used in modern diving apparatus | (2) XeF6 |
| (C) | It is used to provide inert atmosphere for filling electrical bulbs |
(3) XeF4 |
| (D) | Its central atom is in sp3d2 hybridisation | (4) Ar |
Assertion: N2 is less reactive than P4.
Reason: Nitrogen has more electron gain enthalpy than phosphorus.
Among the following, identify the species with an atom in +6 oxidation state
In a regular octahedral molecule mx6, the number of X – M – X bouds at 180° are:-
