Which of the following statements is/are incorrect?
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a
Electron gain enthalpy becomes more negative with increase in atomic number across a period
b
Effective nuclear charge increases from left to right across period
c
Electron gain enthalpy becomes less negative as we go up in a group
d
All of the above
answer is C.
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Detailed Solution
Generally electron gain enthalpy becomes more negative as we go up a group. Because the size of the atom decreases and the added electron would be nearer to the nucleus.