Q18 / 180 · KCET 2019 · Chemistry

The first ionization enthalpy of the following elements are in the order:

  • A
    \( P < S i < C < N \)
  • Correct answer
    B
    \( \mathrm{Si} < \mathrm{P} < \mathrm{C} < \mathrm{N} \)
  • C
    \( \mathrm{C} < \mathrm{N} < \mathrm{Si} < \mathrm{P} \)
  • D
    \( P < S i < N < C \)

Solution

(B)
First \( \Delta H_{I E} \) order is : \( \mathrm{Si} < \mathrm{P} < \mathrm{C} < \mathrm{N} \)

Hence, the correct answer is option: 'B'.

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