MEDIUMMCQ SINGLENEET ChemistryInorganic ChemistryPeriodic PropertiesPrevious Year Questions
Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O? (NEET 2013)
A.Al < Ca < O < C < F
B.Al < O < C < Ca < F
C.C < F < O < Al < Ca
D.Ca < Al < C < O < F✓ Correct
Explanation
Electron gain enthalpy becomes less negative from top to bottom in a group while it becomes more negative from left to right within a period. Hence, the correct order of least negative to most negative electron gain enthalpy will be Ca < Al < C < O < F
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