Mercury is a liquid at room temperature, but it is not an s-block element; however, among the options, it is the only liquid.

Sodium, calcium, and potassium are all essential s-block elements for human health, playing vital roles in various physiological processes.

Magnesium forms a protective oxide layer that prevents further oxidation.

Lithium is widely used in batteries, especially in rechargeable lithium-ion batteries.

Lithium is the least reactive among the alkali metals.

Rubidium is the most reactive among the s-block elements listed.

Lithium is the least reactive among the alkali metals.

Lithium is used in fireworks to produce a bright red color.

Lithium (Li) is used in fireworks to produce a bright red color.

Sodium is commonly used in fireworks for its bright yellow color.

Beryllium forms covalent compounds due to its small size and high ionization energy.

Coordination compounds can exhibit color due to d-d transitions and are not limited to having a positive charge.

S-block elements have one or two electrons in their outermost shell.

Cobalt is a transition metal, and the complex has a coordination number of 6.

[Cr(NH3)6]3+ has an octahedral geometry due to the six ligands surrounding the chromium ion.

[Fe(CN)6]3- is diamagnetic because all the electrons are paired in the d-orbitals of Fe in the +3 oxidation state.

Coordination compounds can exhibit different colors due to the presence of different ligands and their ability to split d-orbitals.

[Fe(CN)6]3- is a low-spin complex due to the strong field ligand CN-, which causes pairing of electrons.

[Co(NH3)6]3+ is octahedral in geometry due to the six ligands surrounding the cobalt ion.

In [Cu(NH3)4]SO4, copper is in +2 oxidation state, NH3 is a monodentate ligand, making the statement 'All of the above' incorrect.

Vanadium can exhibit a +5 oxidation state in compounds like V2O5.

Manganese can exhibit a +7 oxidation state, as seen in permanganate ion (MnO4-).

Copper (Cu) is well-known for forming complex ions due to its ability to coordinate with ligands.

Tin (Sn) is known for forming a stable +4 oxidation state.

All of the listed elements (Nitrogen, Oxygen, Fluorine) are known for forming strong covalent bonds.

Phosphorus can exist in several allotropes, including white, red, and black phosphorus.

Carbon is known for its allotropes, including diamond and graphite.

Rubidium (Rb) has the highest atomic radius among the given s-block elements.

Lithium is used in fireworks to produce a bright red color.

Copper (Cu) is known for forming complex ions with a variety of ligands due to its ability to adopt multiple oxidation states.