Of the ions Zn2+, Ni2+ and Cr3+,
(atomic number of Zn = 30, Ni = 28, Cr = 24)
Only Zn2+ is colourless and Ni2+ and Cr3+ are coloured
Ni2+ and Cr2+ are coloured due to presence of unpaired elecrrons. But Zn2+ is colourless because of absence of unpaired electrons.
Which of the following is called white vitriol?
Nessler’s reagent is
Coinage metals show the properties of
Which of the following elements does not belong to the first transition series?
Zinc does not show variable valency like d-block elements because
Which of the following statements is not true in regard to transition elements?
The catalytic activity of the transition metals and their compounds is ascribed to their
Cuprous ion is colourless, while cupric ion is coloured because
In which of the following metallic bond is strongest?
Which of the following ions has the highest magnetic moment?