Question:
Given below are two statements:
Assertion (A): The cohesive energy of ionic crystals is mainly due to magnetostatic interaction.
Reason (R): It can be calculated on the basis of point charge model.
Given below are two statements:
Assertion (A): The cohesive energy of ionic crystals is mainly due to magnetostatic interaction.
Reason (R): It can be calculated on the basis of point charge model.
Assertion (A): The cohesive energy of ionic crystals is mainly due to magnetostatic interaction.
Reason (R): It can be calculated on the basis of point charge model.
Show Hint
Cohesive energy of ionic crystals is mainly due to electrostatic attraction, not magnetostatic interaction.
Updated On: May 19, 2026
- Both A and R are correct and R is the correct explanation of A
- Both A and R are correct but R is not the correct explanation of A
- A is correct but R is not correct
- A is not correct but R is correct
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Concept:
Ionic crystals are formed due to electrostatic attraction between positive and negative ions.
Step 1: Check Assertion.
The assertion says cohesive energy is mainly due to magnetostatic interaction. This is incorrect. Ionic crystal cohesive energy is mainly due to electrostatic or Coulomb interaction. \[ A \text{ is not correct} \]
Step 2: Check Reason.
Ionic crystal energy can be calculated using the point charge model, where ions are treated as point charges. \[ R \text{ is correct} \]
Step 3: Final conclusion.
Assertion is incorrect, but Reason is correct. \[ \therefore \text{Correct Answer is (D)} \]
Ionic crystals are formed due to electrostatic attraction between positive and negative ions.
Step 1: Check Assertion.
The assertion says cohesive energy is mainly due to magnetostatic interaction. This is incorrect. Ionic crystal cohesive energy is mainly due to electrostatic or Coulomb interaction. \[ A \text{ is not correct} \]
Step 2: Check Reason.
Ionic crystal energy can be calculated using the point charge model, where ions are treated as point charges. \[ R \text{ is correct} \]
Step 3: Final conclusion.
Assertion is incorrect, but Reason is correct. \[ \therefore \text{Correct Answer is (D)} \]
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