Here students can locate TS Inter 1st Year Chemistry Notes 10th Lesson p-Block Elements: Group 13 to prepare for their exam.
TS Inter 1st Year Chemistry Notes 10th Lesson p-Block Elements: Group 13
→ Boron, Aluminium, Gallium, Indium and Thallium are the five elements of group III A.
→ III A group is also known as Boron – Aluminium family. They belong to p – block.
→ The general outer electronic configuration of IIIA group elements is ns2np1.
→ The valency of IIIA group elements is 3 and their common oxidation states are – 3, + 1 and +3.
→ The reluctance of outer s – electron pair (ns electrons) to unpair and participate in bond formation is called inert pair effect.
→ Boron is a non-metal and is a rare element.
→ Aluminium is the most abundant metal in earth’s crust.
→ The oxide of Boron is acidic and aluminium oxide is amphoteric.
→ Important minerals of ‘Al’ are Bauxite (Al2O3 . 2H2O), Cryolite (Na3AlF6).
→ Aluminium metal is extracted by the electrolysis of Bauxite dissolved in cryolite.
→ Crude ‘Al’ metal is purified by Hoope’s process.
→ A mixture of ‘Al’ powder and ammonium nitrate is called ammonal’ and is used as explosive.
→ A 1 : 3 mixture of ‘Al’ powder and Ferric oxide is called ‘thermite mixture’.
→ Potash alum is called common alum, with chemical formula K2SO4. Al2(SO4)3.24H2O.
→ Diborane (B2H6) is prepared by the reduction of Boron trichloride.
→ Diborane is electron deficient molecule and has two three – centered – 2 – electron bonds.
→ Borazole is called inorganic benzene and has the chemical formula B3N3H6.