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AP EAMCET201725 Apr 2017Evening ShiftChemistryChemical Bonding and Molecular StructureActual

Assertion (A): Higher lattice enthalpy leads to greater stability of ionic compounds. Reason (R) : Lattice enthalpy is a direct measure of the electrostatic forces of repulsion among the constituent ions in an ionic solid. The correct answer is

Options

  1. ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
  2. BBoth (A) and (R) are correct and (R) is not the correct explanation of (A)
  3. C(A) is correct, but (R) is not correct
  4. D(A) is not correct, but (R) is correct

Correct answer

C. (A) is correct, but (R) is not correct

Step-by-step solution

Assertion (A): Higher lattice enthalpy leads to greater stability of ionic compounds. This statement is correct. Lattice enthalpy is the energy released when gaseous ions combine to form one mole of a solid ionic compound. A more negative (higher in magnitude) lattice enthalpy signifies a stronger attraction between ions and thus a more stable ionic compound. Reason (R): Lattice enthalpy is a direct measure of the electrostatic forces of repulsion among the constituent ions in an ionic solid. This statement is inco

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