Question

Which is not the correct order for the stated property?

Solution

Correct option is

F > O > N, first ionisation enthalpy

 

On moving along a period, ionisation enthalpy increases. Thus, the order of ionisation enthalpy should be as follows:

                                F > O > N

But N has half-filled configuration, therefore it is more stable than O and has higher ionisation enthalpy. 

SIMILAR QUESTIONS

Q1

 

The formation of the oxide ion O2–(g) requires first an exothermic and then an endothermic step as shown below  

               

                    

This is because 

Q2

The electronic configuration of four elements are given below. Which element does not belong to the same family?

Q3

The least stable ion among the following is

Q4

Ist and IInd IE of Mg are 7.646 and 15.035 eV respectively. The amount of energy needed to convert all the atoms of magnesium into Mg2+ ions present in 12 mg of magnesium vapours is [Given, 1 eV = 96.5 kJ mol–1]

Q5

Which of the following is the most electropositive element?

Q6

Which of the following sequence correctly represents the decreasing acidic nature of oxides?

Q7

Which of the following pairs of species have nearly same size?

Q8

The set representing the correct order of ionic radius is

Q9

The pair of elements having approximately equal ionisation potential is

Q10

The correct order of ionisation energy of C, N, O, F is