The +3 ion of which one of the following has half-filled 4f subshell?
Gd = [Xe] 4f7 5d1 6s2,
Gd3+ = [Xe] 4f7 (half-filled)
Acidified solution of chromic acid on treatment with hydrogen peroxide yields
Prussian blue is due to formation of
On adding excess of NH3 solution CuSO4 solution, the dark blue colour is due to
Which statement is not correct?
Yellow mercury (II) oxide is obtained when
Which of the following method can’t be used to prepare anhydrous zinc chloride?
Which lanthanoid compound is used as a most powerful liquid lasers after dissolving it in selenium oxychloride?
Which one of the following acts as an oxidizing agent?
Across the lanthanide series, the basicity of lanthanide hydroxides