Chemistry
Grade-9
Easy
Question
Which of the compounds shows the highest lattice energy?
- NaCl
- KCl
- RbCl
- CsCl
Hint:
Lattice energy is directly proportional to the charge.
Lattice energy is inversely proportional to the distance of separation.
The correct answer is: NaCl
- Lattice energy is the energy required to completely separate a mole of a solid ionic compound completely in its gaseous ions.
- Lattice energy is directly proportional to charge. The larger the charge larger is lattice energy.
- Lattice energy is inversely proportional to the charge separation. Smaller the separation larger the lattice energy.
- Here all the compounds are mono-ionic, hence it depends on the charge separation only.
- NaCl has the lowest bond length and highest lattice energy.
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