Explanation
Al2(CO3)3 is less soluble in water than Na2CO3, ZnCO3
Inert pair effect is most prominent in Pb because from top to bottom due to increase in number of shells.
Pb + Sn
In carbon family stability +2 oxidation state increases on moving down the group in the periodic table with an increase in atomic number due to screening effect.
In crystalline lattice of diamond, each crbon atom is linked to four other carbon atoms tetrahedrally by using sp3 - hydbrid orbitals giving rise to a rigid there dimensional network of carbon atom for this reason, diamond is very hard.Graphite, has hexagonal layer structure in which each carbon atom is linked to three other carbon atoms by using sp2 hybrid orbitals. The hexagonal layer in graphite are held together by weak Van-der waal's forces. So graphite is soft.
Supercritical CO2 is used as a solvent for the extraction of organic compound from their natural sources.
Pb ⇒ 11.34 g/ml heaviest
Pb3O4 is a mixed oxide of 2PbO + PbO2
Boron (B),Si,Ge,As,Sb & At are metalloid elements. Bismuth (Bi) & tin (Sn) are metal while carbon (C) is non - metal.
Solid CO2 is called dry ice because it changes to vapour state directly without changing to liquid state
It reacts with alkali as well as acid.
Excess of one valence electron in P atom over Si will form n type conductor.
Carbogen is mixture of 90% O2 and 10% CO2
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