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D and F Block Elements question

2023 · Q119
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D and F Block Elements question

2023 · Q119

NEETChemistryD and F Block ElementsMCQ+4 / −1

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}_{2} \mathrm{O}_{3}Sc2​O3​ to Mn2O7\mathrm{Mn}_{2} \mathrm{O}_{7}Mn2​O7​.

C. Basic character increases from V2O3\mathrm{V}_{2} \mathrm{O}_{3}V2​O3​ to V2O4\mathrm{V}_{2} \mathrm{O}_{4}V2​O4​ to V2O5\mathrm{V}_{2} \mathrm{O}_{5}V2​O5​.

D. V2O4\mathrm{V}_{2} \mathrm{O}_{4}V2​O4​ dissolves in acids to give VO43−\mathrm{VO}_{4}^{3-}VO43−​ salts.

E. CrO\mathrm{CrO}CrO is basic but Cr2O3\mathrm{Cr}_{2} \mathrm{O}_{3}Cr2​O3​ is amphoteric.

Choose the correct answer from the options given below:

  1. A
    B and D only
  2. B
    C and D only
  3. C
    B and C only
  4. D
    A and E only
View written solutionFree

Correct answer: B

NEET 2023 Chemistry - d and f Block Elements Question 14 English Explanation

$$\mathrm{D} \rightarrow \mathrm{V}_{2} \mathrm{O}_{5}$$ dissolve in acid to give $\mathrm{VO}_{4}^{-3}$ salts. This doesn't shown by $$\mathrm{V}_{2} \mathrm{O}_{4}$$

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