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Given below are two statements: Statement I : The correct order of first ionization enthalpy values of Li, Na, F and Cl is Na < Li < Cl < F. Statement II : The correct order of negative electron gain enthalpy values of Li, Na, F and Cl is Na < Li < F < Cl In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is false but Statement II is true
4. Statement I is true but Statement II is false

Correct answer: Both Statement I and Statement II are true

Solution

Both statements accurately reflect the trends in ionization enthalpy and electron gain enthalpy across the elements listed. Ionization enthalpy increases across a period and decreases down a group, while electron gain enthalpy becomes more negative across a period due to increasing nuclear charge.

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