Consider the following statements: 1. Lattice energy increases with an increase in the charge of the ions. 2. Lattice energy decreases with an increase in the size of the ions. Which is/are correct? MCQ with Answer and Explanation
Consider the following statements: 1. Lattice energy increases with an increase in the charge of the ions. 2. Lattice energy decreases with an increase in the size of the ions. Which is/are correct?
A. Neither 1 nor 2
B. 2 only
C. 1 only
D. Both 1 and 2
Answer: Option D
Solution (By JKExamLibrary)
Lattice energy is the energy required to separate one mole of an ionic solid into its gaseous ions. According to Coulomb's law, it is directly proportional to the product of the ionic charges and inversely proportional to the sum of their radii. Thus, higher charges and smaller sizes both increase lattice energy.
Explanation:
Alpha particles, being heavy and doubly charged, cause intense ionization over a short distance. They are least penetrating. Gamma has low ionization but high penetration.
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