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Q.

 Second ionization energy is higher than first ionization energy for an element. This is because

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a

 Nuclear charge is high in cation

b

 Size of cation is higher than neutural atom

c

 Effecive nuclear charge is more for cation

d

Bond energy changes with charge

 

answer is C.

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Detailed Solution

  • In first ionization energy, we remove electron from a neutral atom, but for second ionization energy, we have to remove electron from a positive atom, where electrons are more tightly bounded due to increased nuclear attraction force and small size of cation than its neutral atom.
  • Hence, second ionization energy is high relative to first IP.
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