The one that is extensively used as a piezoelectric material is :

Among the oxides of nitrogen : N₂O₃, N₂O₄ and N₂O₅; the molecule(s) having nitrogen-nitrogen bond is / are :

A group 13 element 'X' reacts with chlorine gas to produce a compound XCl₃. XCl₃ is electron deficient and easily reacts with NH₃ to form Cl₃X $$ \leftarrow $$ NH₃ adduct ; however, XCl₃ does not dimerize X is :

The compound that does not produce nitrogen gas by the thermal decomposition is :