A) \[N{{a}^{+}}(s)+\frac{1}{2}C{{l}_{2}}(g)\xrightarrow{{}}NaCl(s)\]
B) \[N{{a}^{+}}(s)+C{{l}^{-}}(g)\xrightarrow{{}}NaCl(s)\]
C) \[N{{a}^{+}}(g)+C{{l}^{-}}(g)\xrightarrow{{}}NaCl(s)\]
D) \[N{{a}^{+}}(s)+Cl(s)\xrightarrow{{}}NaCl(s)\]
Correct Answer: C
Solution :
Lattice energy Lattice energy is the energy released during the formation of a crystal lattice from the respective gaseous cations and anions, or it is the energy required to separate one mole of the solid ionic compound into its gaseous ions. eg, \[N{{a}^{+}}(g)+C{{l}^{-}}(g)\xrightarrow{{}}NaCl(s)\] Thus, lattice energy (the force of attraction among the ions) is a direct measure of the stability of ionic crystals, higher the lattice energy of a compound, lower will be its solubility in water.
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