Question

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)

• A. I, II, III and IV
• B. Only II
• C. Both II and III
• D. Both II and IV

Answer 1

Answer: (A)

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