AIPMT PRELIMS2010Chemistry-Periodic Properties
AIPMT PRELIMS 2010 Chemistry Electron Gain Enthalpy MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl?
A
S < O < Cl < F
B
Cl < F < O < S
C
O < S < F < Cl
D
F < S < O < Cl
Correct Answer
Option C
Detailed Explanation
Group 17 elements have higher electron gain enthalpy than Group 16. The order is O < S < F < Cl due to the increasing atomic size and decreasing electron affinity.
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