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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
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Medium
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Understanding
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Assertion (A): Electron gain enthalpy becomes less negative as we go down a group.
Reason (R): Size of the atom increases on going down the group and the added electron would be farther away from the nucleus.
Reason (R): Size of the atom increases on going down the group and the added electron would be farther away from the nucleus.
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Correct option: A
Both Assertion and Reason are correct; Reason is the correct explanation of Assertion
Option A is correct. As we go down a group, the atomic size increases, and the added electron experiences less attraction from the nucleus due to increased shielding, making the electron gain enthalpy less negative.
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