The coordination number and the oxidation state of the element ‘E’ in the complex [E(en)₂(C₂O₄)]NO₂ (where (en) is ethylene diamine) are, respectively,

The organic chloro compound, which shows complete stereochemical inversion during a S_N2 reaction, is

Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives

Identify the wrong statements in the following :