JEE · NEET Previous Year Question
The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is:
Topic: JEE PYQ
Answer: D. Full step-by-step solution below.
- AF < S < P < B
- BP < S < B < F
- CB < P < S < F
- DB < S < P < F
Correct answer: D
Solution
(d) In general as we move from left to right in a period, the ionisation enthalpy increases with increasing atomic number. The ionisation enthalpy decreases as we move down a group. has a stable half filled electronic configuration hence, its ionisation enthalpy is higher than that of S .∴ Increasing order of ionization energy is
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