The d- and f- B...

Variable valency of transition elements is on account of :

Which of the following pair has the same size?

Colour in transition metal compounds is attributed to :

Transition metals are less reactive because of their :

The magnetic moment of an ion is close to $$36\times 10^{-24}$$Joule /Tesla. The number of unpaired electrons of the ion are ____________.

Statement 1: Lanthanides have much less tendency to form complexes than actinides.
Statement 2: Compared to actinides, the lanthanides have relatively larger size of atoms and less nuclear charge.

The purple colour of $$[Ti(H_{2}O)_{6}]^{3+}$$ ions is due to ______________?

The radius of $$La^{3+}$$ (At. No. of La = 57) is 1.06 A$$^{0}$$. Which one of the following given values will be closest to the radius of $$Lu^{3+}$$?( Atomic number of Lu=71)

The catalytic activity of transition metals and their compounds is ascribed mainly to:

In which of the following pairs are both the ions coloured in aqueous solution?
[At. No. : $$Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27$$]