NEETChemistryPeriodic Table and PeriodicityMCQ+4 / −1
The correct order of first ionization enthalpy for the given four elements is :
- AC < F < N < O
- BC < N < F < O
- CC < N < O < F
- DC < O < N < F
View written solutionFree
Correct answer: D
$\bullet$ Generally, on moving left to right in a period. First ionization enthalpy of elements increases due to increase in effective nuclear charge.
$\bullet$ Due to more stable half-filled outer electronic configuration (2s22p3) of N, its first ionization enthalpy is more than O.
So, correct order of IP is : C < O < N < F
More from Periodic Table and Periodicity
- Decrease in size from left to right in actinoid series is greater and gradual than that in lanthanoid series due to2022 · MCQ
- Fluorine is a stronger oxidising agent than chlorine because : (a) F-F bond has a low enthalpy of dissociation. (b) Fluoride ion (F) has high hydration enthalpy. (c) Electron gain enthalpy of fluorine is less negative than chlorine. (d)…2022 · MCQ
- If first ionization enthalpies of elements X and Y are 419 kJ mol1 and 590 kJ mol1, respectively and second ionization enthalpies of X and Y are 3069 kJ mol1 and 1145 kJ mol1, respectively. Then correct statement is :2022 · MCQ
- The IUPAC name of an element with atomic number 119 is2022 · MCQ
- Gadolinium has a low value of third ionisation enthalpy because of2022 · MCQ
- Identify the incorrect match. Includes table2020 · MCQ
- Match the following : Which of the following is correct option? Includes table2020 · MCQ
- For the second period elements the correct increasing order of first ionization enthalpy is :2019 · MCQ