Question

The incorrect statement for d-block element is:
(A) it shows magnetic property
(B) it has variable valency
(C) it has tendency to form colored ions
(D) it has complete d-orbitals

Answer 1

It is important to understand what are d-block elements. Write down the general electronic configuration of d-block elements. By this you can identify the properties exhibited by d-block elements and thus answer the question.

Complete step-by-step answer:
D block elements or D block metals are elements that have partially filled d orbitals.
IUPAC defines transition elements as an element having a d subshell that is partially filled with electrons that are able to form stable cations even with an incomplete d orbital. Transition elements are a subset of d block elements.
The characteristics of d block elements are :
- A large variety of ligands can bind themselves to the transition elements
- Compounds of d block elements have a characteristic colour due to electron transition in the degenerate orbitals.
- These elements have a large ratio of charge to radius
- D block elements tend to be hard and they have relatively high densities when compared to elements of the same period.
From the above statements we can say that the incorrect option is that d block elements have complete d orbitals.
Therefore, the correct answer is option (D).

Note: All elements present in the block of the periodic table are transition elements except zinc, cadmium and mercury. This is because they have completely filled d orbitals and thus do not exhibit properties like other d block elements. They do not show variable valency too.