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Grade: 12
        
Why acidity  of dioxide  of group  16 increased from bottom  to top
one month ago

Answers : (2)

Vikas TU
9225 Points
							
Dear student 
The dioxide molecules contain pπ–pπ bonds which become weaker with increase in atomic number because, increase in atomic no. increases size along a group and hence there occurs an increase in the bond length and so the reducing character decreases down the group.
 Due to presence of d-orbitals(vacant) sulphur can extend its co valency and show oxidation states till +6, which is stable in sulphur (eg: SF6). Hence it acts as a reducing agent, and now the character decreases down the group because of decrease in strength of the pπ–pπ bonds while, unlike sulphur Te cannot show +6 oxidation state as it is highly unstable due to inert pair effect. Therefore there can only be a decrease in it oxidation state (it can decrease to -2, +2 etc.
Hence, TeO2 acts as oxidizing agent.
one month ago
Arun
22824 Points
							All group 16 elements form oxides of the type EO2 and EO3 Reducing character of dioxides decreases down the group. Acidity also decreases down the group. ... Because in water due to the small size and high electronegativity of O, strong hydrogen bonding is present there.
						
one month ago
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