An element ‘E’ has the ionisation enthalpy value of 374 kJ mol⁻¹. ‘E’ reacts with elements A, B, C and D with electron gain enthalpy values of −328, −349, −325 and −295 kJ mol⁻¹, respectively. The correct order of the products EA, EB, EC and ED in terms of ionic character is :

Given below are two statements :

Statement (I) : The radii of isoelectronic species increases in the order.

Mg^²⁺ < Na^⁺ < F^⁻ < O²⁻

Statement (II) : The magnitude of electron gain enthalpy of halogen decreases in the order.

Cl > F > Br > I

In the light of the above statements, choose the most appropriate answer from the options given below :

The molar mass of the water insoluble product formed from the fusion of chromite ore (FeCr₂O₄) with Na₂CO₃ in presence of O₂ is ___________ g mol^⁻¹.

Given below are some nitrogen containing compounds :

Each of them is treated with HCl separately. 1.0 g of the most basic compound will consume _______ mg of HCl.

(Given molar mass in g mol⁻¹ C : 12, H : 1, O : 16, Cl : 35.5)