NEET · Chemistry · STD 12 - 4. d and f- block elements
Which of the following statements are INCORRECT? \(A\). All the transition metals except scandium form \(MO\) oxides which are ionic. \(B\). The highest oxidation number corresponding to the group number in transition metal oxides is attained in \(Sc _2 O _3\) to \(Mn _2 O _7\). \(C\). Basic character increases from \(V _2 O _3\) to \(V _2 O _4\) to \(V _2 O _5\). \(D\). \(V _2 O _4\) dissolves in acids to give \(VO _4^{3-}\) salts. \(E\). \(CrO\) is basic but \(Cr _2 O _3\) is amphoteric. Choose the correct answer from the options given below:
- A \(B\) and \(C\) only
- B \(A\) and \(E\) only
- C \(B\) and \(D\) only
- D \(C\) and \(D\) only
Answer & Solution
Correct Answer
(D) \(C\) and \(D\) only
Step-by-step Solution
Detailed explanation
All transitions metals except \(Sc\) from MO oxides which are ionic. - The highest oxidation number corresponding to the group number in transition metal oxides in attained in \(Sc _2 O _3\) to \(Mn _2 O _7\).
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