List of top Chemistry Questions on Electronic Configurations of the d-Block Elements

Assertion (A) : \( E^{\circ}_{Sc^{3+}/Sc^{2+}} \) has low value.
Reason (R) : Because of the stability of \( Sc^{3+} \) ion which has a noble gas configuration.
Electronic configuration of chromium is:
Electronic configuration of chromium is :
How do you prepare K₂Cr₂O₇ from chromite ore?
Which elements are called transition elements? Explain: (i) Transition metals generally form coloured compounds, (ii) Transition metals or ions and many of their compounds show paramagnetic behaviour.
In solution Cu$^+$ ions are colourless while Cu$^{2+$ ions are coloured. Why?}
Colourless ion in the following is –
Write the colour of the following ions in aqueous solution: (i) Zn$^{2+$ (ii) Cu$^{2+}$ (iii) Fe$^{2+}$.}
Number of unpaired electrons in Cu$^{2+$ (Z = 29) is –}
The most common oxidation states of Mn are –
Transition metals generally form coloured compounds.
In comparison to Mn\(^ {3+}\) ions Mn\(^ {2+}\) ions are more stable. Why?
From the elements of 3d series below, which element shows the maximum number of oxidation states?
Compounds of transition metals are generally coloured. Give reason.
Why are transition elements good catalysts?
Why is first ionization enthalpy of chromium lower than that of Zn?
The general electronic configuration of d-block elements is:
Four alternatives are given in each part of this question. Write the correct alternative in your answer-book. Fe is:
The configuration showing maximum oxidation state is: