Auto ionization of anhydrous Sulphuric acid:

 Anhydrous  sulphuric acid is an  acidic Solvent the main auto ionization is

(1) The Mobility of H₃SO₄⁺ and HSO₄^-  are comparable to H₃O⁺ and  OH^- and most of acid accept H⁺ from H₂SO₄  and thus behave as base. For example H₂PO₄ and HNO₃ .

(2) HClO₄ and HFSO₃ are very strong acid in water but very poor weak acid in sulphuric acid. 

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Solvolysis in liquid NH3 (Ammonolysis):

 

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Hydrolysis reactions:

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Solvolysis in liquid N2O4:

 

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Crystal lattice Structure of Oxides:

• (1) Spinel Structure: 
• (2) Corundum (Al2O3) type Structure:
• (3) Rutile (TiO2) type Structure:
• (4) Pervoskite (ABO3) type structure:

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