Question

 

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

               

                    

This is because 

Solution

Correct option is

O ion will tend to resist the addition of another electron

The addition of second electron in an atom or ion is always endothermic as the incoming electron experience the greater force of repulsion.

SIMILAR QUESTIONS

Q1

The ionic radius of ‘Cr’ is minimum in which of the following compounds?

Q2

The incorrect statement among the following is

Q3

Which ionisation potential (IP) in the following equations involves the greater amount of energy?

Q4

The first four ionisation energy values of an element are 191, 578, 872 and 5962 kcal. The number of valence electrons in the element is

Q5

Which one of the following elements has the highest ionisation energy?

Q6

In the Periodic Table, going down in the fluorine group

Q7

The Ist IEs of four consecutive elements present in the second period of Periodic Table are 8.3, 11.3, 14.5 and 13.6 eV respectively. Which of these is the IE of nitrogen?   

Q8

Which of the following transition involves maximum amount of energy?

Q9

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

Q10

The least stable ion among the following is