Question

The correct statement (s) from the following is/are:
i) All the d and f-block elements are metals.
ii) All d and f-block elements form coloured ions.
iii) All d and f-block elements are paramagnetic.
A. i only
B. i and ii
C. ii and iii
D. All

Answer 1

Hint: All the d & f block elements are metals. Some of these elements in the d & f block make coloured ions which have empty d orbitals or some impurities. Some of these elements are paramagnetic which have unpaired electrons in their electronic configuration.

Complete step by step solution: -
d block elements can be found from the third group to the twelfth group of the modern periodic table. The valence electrons are always in the d orbital. D block elements are also known as transition elements or transition metals.
d block elements show commonly metallic behaviour of high tensile strength, malleability, ductility, electrical and thermal conductivity.
f block elements are classified into two series, namely lanthanoids and actinoids. These blocks of elements are also known as inner transition metals.
f block elements also show metallic behaviour. Hence, all the d and f-block elements are metals.
Transition metals have empty or half-filled d orbitals, that is why some d and f-block elements form a coloured ion. So, some elements form a coloured ions.
Due to the presence of unpaired electrons in their electronic configuration in elements, they show paramagnetic character. So, some elements are paramagnetic.

Hence, the correct option is (A).

Note: Paramagnetic atoms are attracted to the magnetic field due to the presence of unpaired electrons. If all electrons are paired in the elements, they show diamagnetic character. Diamagnetic atoms are repelled to the magnetic field due to paired electrons. $C{r^{ + 3}}$ shows violet colour, $M{n^{ + 2}}$ shows a pale pink colour and $Z{n^{ + 2}}$ does not show any colour.