Explanation
The covalent character in case of some anionic species, depends upon the size of central atom and decreases with increase in the size of central atom.
Metallic oxides are basic in nature while non-metallic oxides are acidic in nature.
Pesticides — destroy insects (pests)
Members of group 15 or VA = Pnictogens.
Black phosphorous is more thermodynamically stalile than red, black, white, yellow allotropic forms.
White phosphorous is most reactive. It is insoluble in water.
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