AIEEE 2003 | d and f Block Elements Question 217 | Chemistry

The atomic numbers of vanadium (V), Chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?

AIEEE 2003

MCQ (Single Correct Answer)

-1

The number of d-electrons retained in Fe²⁺ (At no of Fe = 26) ion is :

AIEEE 2002

MCQ (Single Correct Answer)

-1

How do we differentiate between Fe³⁺ and Cr³⁺ in group III?

by taking excess of NH₄OH solution

by increasing $$NH_4^+$$ ion concentration

by decreasing OH^- ion concentration

both (b) and (c)

AIEEE 2002

MCQ (Single Correct Answer)

-1

When KMnO₄ acts as an oxidising agent and ultimately forms [MnO₄]^-2, MnO₂, Mn₂O₃, Mn⁺² then the number of electrons transferred in each case respectively is :

4, 3, 1, 5

1, 5, 3, 7

1, 3, 4, 5

3, 5, 7, 1

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