1. Tardigrade
  2. Question
  3. Chemistry
  4. I. As the oxidation number of a metal increases, ionic character decreases. II. In case of Mn , Mn 2 O 7 is a covalent green oil which possess predominantly acidic character and it gives HMnO 4. III. V 2 O 5 is amphoteric, it gives VO 43- as well as VO 2+ salts. IV. CrO is basic, while Cr 2 O 3 is amphoteric. The correct set of statements is/are (choose the appropriate option)

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Q. I. As the oxidation number of a metal increases, ionic character decreases.
II. In case of $Mn , Mn _{2} O _{7}$ is a covalent green oil which possess predominantly acidic character and it gives $HMnO _{4}$.
III. $V _{2} O _{5}$ is amphoteric, it gives $VO _{4}^{3-}$ as well as $VO _{2}^{+}$ salts.
IV. $CrO$ is basic, while $Cr _{2} O _{3}$ is amphoteric.
The correct set of statements is/are
(choose the appropriate option)

The d-and f-Block Elements

Solution:

Correct answer is (a) I, II, III and IV