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Q.

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.
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