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Electronic configuration and general trends of transition metals

28 questions on Electronic configuration and general trends of transition metals from the d- and f-Block Elements chapter: 6 NEET level, 11 JEE Main, 11 JEE Advanced. Each one opens with its answer and solution.

Practice this topic All d- and f-Block Elements topics

The ground-state electronic configuration of chromium (Z = 24) is NEET level
Among the following elements, the one that is NOT a transition element by the IUPAC definition (an element having an incomplete d subshell in the atom or in any... NEET level
The spin-only magnetic moment of Fe^3+ (Z = 26) is closest to NEET level
Which of the following aqueous ions is colourless? NEET level
Among Ti, Cr, Mn and Fe, the metal that shows the highest oxidation state in its compounds is NEET level
Which of the following ions is diamagnetic? NEET level
Among Cr, Mn, Fe and Ni, the standard electrode potential E deg(M^2+/M) is most negative for JEE Main level
Assertion (A): Mn^2+ does not get oxidised to Mn^3+ in aqueous solution, as E deg(Mn^3+/Mn^2+) = +1.5 V. Reason (R): Mn^2+ has the stable half-filled 3d^5 confi... JEE Main level
Zr (160 pm) and Hf (159 pm) have nearly identical atomic radii because JEE Main level
The spin-only magnetic moment of gaseous Cr^2+ (Z = 24) is JEE Main level
The most acidic oxide among TiO2, V2O5, CrO3 and Mn2O7 is JEE Main level
Match the free ions in List I with their spin-only magnetic moments in List II. List I: (P) Ti^3+, (Q) Fe^3+, (R) Ni^2+, (S) Cr^3+. List II: (1) 5.92 BM, (2) 1.... JEE Main level
In aqueous solution Cu^+ disproportionates to Cu^2+ and Cu mainly because JEE Main level
Among Ti, V, Mn and Fe, the metal with the highest third ionisation enthalpy is JEE Main level
Among the free ions Fe^2+, Co^2+, Ni^2+ and Cu^2+, the highest spin-only magnetic moment is shown by JEE Main level
Select ALL gaseous free ions that have a spin-only magnetic moment of 3.87 BM. JEE Main level
Select ALL species that are colourless in the solid or in aqueous solution because they have no d-d transitions. JEE Main level
Metal M (Z = 26) forms the ion M^3+ and metal N (Z = 24) forms the ion N^3+. Using mu = sqrtn(n+2) BM for the free gaseous ions, calculate the ratio mu(M^3+)/mu... JEE Advanced level
Which of the following has the highest spin-only magnetic moment? JEE Advanced level
A yellow solution of potassium chromate turns orange on acidification with dilute H2SO4 to give X. In acidic medium X oxidises Fe^2+ to Fe^3+, and the chromium ... JEE Advanced level
In weakly alkaline medium MnO4^- oxidises I^- to IO3^- and is itself reduced to MnO2. The mass of KMnO4 (molar mass 158 g mol^-1) required to oxidise 0.05 mol o... JEE Advanced level
Data in kJ/mol: for Cu, enthalpy of atomisation 340, Delta_iH_1 + Delta_iH_2 = 2700, hydration enthalpy of Cu^2+ -2120; for Zn, enthalpy of atomisation 130, Del... JEE Advanced level
Zn has a much lower enthalpy of atomisation than V. The correct explanation is JEE Advanced level
Assertion (A): Cr^2+ is a strong reducing agent whereas Mn^3+ is a strong oxidising agent in aqueous solution. Reason (R): Cr^2+ -> Cr^3+ leads to the stable t_... JEE Advanced level
Match the neutral gaseous atom (ground state) in List I with its spin-only magnetic moment in List II. List I: (P) Z = 24, (Q) Z = 25, (R) Z = 26, (S) Z = 29. L... JEE Advanced level
KMnO4 is deep purple although the manganese in MnO4^- has no d electrons. Which description is correct? JEE Advanced level
Select ALL correct statements. JEE Advanced level
Select ALL gaseous free ions in their ground state that have a spin-only magnetic moment of 5.92 BM. JEE Advanced level