Which of the following statements are correct? (A) The M3+/M2+ reduction potential for iron is greater than manganese. (B) The higher oxidation states of first row d-block elements get stabilized by o

Question

Which of the following statements are correct? (A) The M3+/M2+ reduction potential for iron is greater than manganese. (B) The higher oxidation states of first row d-block elements get stabilized by oxide ion. (C) Aqueous solution of Cr2+ can liberate hydrogen from dilute acid. (D) Magnetic moment of V2+ is observed between 4,4 – 5.2 BM. Choose the correct answer from the options given below :

(A) (A), (B) only
(B) (A), (B), (D) only
(C) (B), (C) only
(D) (C), (D) only

Prashant Kotian · Accepted Answer

Correct answer: C. (A) Mn+2 is having stable d5 configration (B) CrO4–2 , MnO4– (C) Cr+2(aq) + H+(aq)   Cr+3(aq) + H2 (D) three unpaired e–, therefore it is 3.87 BM

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