Regarding transitional elements, the wrong statement is

Options

A. they exhibit variable valences.
B. they possess low melting points.
C. they are good catalysts.
D. they form coloured complexes.

Answer

B

Explanation

Transition elements have high melting points due to the presence of strong interatomic bonds, which involve the participation of both ns and (n - 1)d electrons.
In each series, the melting points of these metals increase to a maximum of `d^(6)`, Mn and Tc being exceptions having low melting points, and then regularly decrease as the atomic number increases.