Q43 / 180 · NEET 2019 (All India) · Chemistry
For the second period elements the correct increasing order of first ionization enthalpy is:
- A
- Correct answerB
- C
- D
Solution
Ionisation Enthalpy Zeffective Stable configuration.
As we move from Left to right in a period, ZEffective increases. So, ionization enthalpy increases. The exceptions are as give below:

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