Telegram group: T.me/BBCNOUN [CHM426] The coordination geometries of lanthanides are determined by ligand steric factors rather than …....... crystal field effects. [CHM426] Which of the following statement concerning lanthanides elements is false? ionic radii of trivalent lanthanides steadily increase with increase in the atomic number [CHM426] In context of the lanthanoids, which of the following statements is not correct? Availability of 4 f electrons results in the formation of compounds in +4 state for all themembers of the series [CHM426] Lanthanide metal reacts with all the …...... to form lanthanide(III) halides halogens [CHM426] The hydroxides of lanthanides have …..... shape hexagonal [CHM426] The lanthanide contraction is responsible for the fact that_____ Zr and Hf have about the same radii [CHM426] Which of the following statement is not correct? La(OH)3 is less basic than $$Lu(OH)_{3}$$ [CHM426] Hydroxides of lanthanoids are strongly ….. basic [CHM426] In chromite ore, the oxidation number of iron and chromium are respectively_____ +2, +3 [CHM426] In the electrolytic refining of Zinc, ______. acidified zinc sulphate is the electrolyte.