Chemistry-Ionic Bond
NEET Chemistry Ionic Bond MCQ Question
Type: MCQ-numerical-Medium-Class 11
What is the lattice enthalpy of NaCl in kJ mol⁻¹, and what does this value indicate about the energy involved in the formation of NaCl from its gaseous ions?
A
788; it indicates the energy required to separate the gaseous ions.
B
788; it indicates the energy released during bond formation.
C
769; it indicates the energy required to form the ionic bond.
D
769; it indicates the energy needed to achieve electron octet.
Correct Answer
Option A
Detailed Explanation
The lattice enthalpy of NaCl is 788 kJ mol⁻¹, which is the energy required to completely separate one mole of solid NaCl into gaseous Na⁺ and Cl⁻ ions.
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