Given below are two statements:

Statement I: The pentavalent oxide of group-15 element, , is less acidic than trivalent oxide, , of the same element.

Statement II: The acidic character of trivalent

Question

Given below are two statements:

Statement I: The pentavalent oxide of group-15 element, , is less acidic than trivalent oxide, , of the same element.

Statement II: The acidic character of trivalent oxide of group 15 elements, , decreases down the group.

In light of the above statements, choose most appropriate answer from the options given below:

Canvas Classes · Accepted Answer

Statement I:  (higher oxidation state) is more acidic than  (lower oxidation state) for the same element. Higher oxidation state → more electron-withdrawing → more acidic. Statement I is false. ✗

Statement II: Acidic character of  decreases down Group 15:
- : acidic
- : acidic
- : amphoteric
- : amphoteric (more basic)
- : basic

Acidic character decreases down the group. Statement II is true. ✓

Answer: Option (3) — Statement I is false but Statement II is true

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