In a neutral or faintly alkaline medium, potassium permanganate (KMnO4) oxidizes iodide ion (I-) into 'X'. Identify 'X'.

Although the +3 oxidation state is most common in lanthanoids, cerium (Z = 58) exhibits a stable +4 oxidation state because:

The calculated 'spin-only' magnetic moment of Ti2+ (3d2) ion is:

Match List I (Transition metal/compound/complex) with List II (Catalytic Role): List I: A. V2O5 B. Fe C. PdCl2 D. Ni complex List II: I. Preparation of ammonia from N2/H2 mixture II. Polymerisation of alkynes III. Preparation of H2SO4 from SO2 (Contact Process) IV. Oxidation of ethyne to ethanal (Wacker process) Choose the correct matching:

The remarkable catalytic activity of transition elements and their compounds is primarily attributed to their:

Scandium (Sc) is considered a transition element, but Zinc (Zn) is not. Why?

What are the highest oxidation states shown by Chromium (Cr) and Manganese (Mn) in their compounds, respectively?

The steady decrease in atomic and ionic radii of lanthanoid elements from Lanthanum (La) to Lutetium (Lu) is due to:

Chromates are strong oxidizing agents, whereas molybdates and tungstates are generally non-oxidizing under similar conditions. Why?