Ionic Bond — Prelims Strategy

Prelims Strategy

To excel in NEET questions on ionic bonds, a multi-pronged strategy is essential. Firstly, thoroughly understand the fundamental principles: the octet rule, the concept of electron transfer, and the electrostatic attraction.

Memorize the factors favoring ionic bond formation (low IE, high EGE, high lattice enthalpy) and be able to apply them. For numerical problems, particularly those involving the Born-Haber cycle, ensure you can correctly set up the equation and substitute values.

Pay close attention to the signs of enthalpy changes (e.g., IE is positive, EGE can be positive or negative, lattice enthalpy is negative). For conceptual questions on properties, link each property (e.

g., high melting point, conductivity) directly to the strong electrostatic forces and the fixed nature of ions in the solid state versus their mobility in molten/aqueous states. Fajan's rules are critical for questions on covalent character; practice identifying small, highly charged cations and large, polarizable anions.

When comparing compounds, systematically analyze charges and sizes to predict trends in lattice enthalpy, melting points, and solubility. Watch out for trap options that might confuse properties of ionic solids with metals or covalent compounds, or misinterpret Fajan's rules.