Transition Metals | MCQs

Explanation

Explanation

In the complex  [ 𝐹 𝑒 ( 𝑁 𝐻 3 ) 6 ] ^2 + , iron (Fe) is in the +2 oxidation state, meaning it has a  𝑑6 electron configuration.

Ammonia (NH₃) is considered a strong field ligand under Crystal Field Theory (CFT), causing the electrons in the 𝑑-orbitals to pair up due to the large splitting of the 

𝑑-orbitals.

In a strong field environment, the electrons occupy the lower energy  𝑡2𝑔 orbitals first, and all six electrons pair up, leaving no unpaired electrons.

Therefore, the number of unpaired electrons is 0.

Explanation

Osmium is the densest naturally occurring element, with a density of approximately 22.59 g/cm³.

This makes it the highest density transition element, far exceeding the densities of elements like mercury and zinc.

Explanation

Explanation

Explanation

In the 3d series of the periodic table, melting and boiling points generally increase up to the middle,

Reaching a peak around elements like Chromium (Cr), and then decreasing towards the end of the series, with Zinc (Zn) having the lowest melting point. 

Explanation

Cobalt (Co) is a typical transition metal with partially filled d-orbitals, a key trait of transition elements.

It shows variable oxidation states and forms colored compounds—classic properties of transition metals.

Explanation

Manganese (Mn) shows a maximum oxidation state of +7, as seen in compounds like KMnO₄ (potassium permanganate).

This is higher than the maximum oxidation states of Cr (+6), P (+5), and S (+6).

Explanation

The d-block elements are located in the periodic table between the s-block and p-block elements and are characterized by the filling of the d subshell. These elements are known as transition elements or transition metals.

Explanation

GROUP - 11 (I B) [Copper, Silver and Gold]

Copper, Ag, and Au are known as coinage metals

Because they were used to make coins.

All the metals are noble w.r.t. chemical activity.