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ChemistryNEET 2023Transition elements: trends and properties

The 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 Sc2O3\mathrm{Sc_2O_3} to Mn2O7\mathrm{Mn_2O_7}.

C. Basic character increases from V2O3\mathrm{V_2O_3} to V2O4\mathrm{V_2O_4} to V2O5\mathrm{V_2O_5}.

D. V2O4\mathrm{V_2O_4} dissolves in acids to give VO43−\mathrm{VO_4^{3-}} salts.

E. CrO is basic but Cr2O3\mathrm{Cr_2O_3} is amphoteric.

Choose the correct answer from the options given below:

  1. A.A and E only
  2. B.B and D only
  3. C.C and D only✓
  4. D.B and C only

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

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