Question

Which of the following relation is correct?

Solution

Correct option is

Ist IE of C > Ist IE of B

 

6⟶ 1s2, 2s2, 2p2 

5⟶1s2, 2s2, 2p1  

In first case IE1 of C > IE1 of B. Since, carbon is smaller than B in size. But IE2 (B) > IE2 (C) because electron are paired as well as present in inner s-orbital where as for carbon it will be still in 2p-orbital and in unpaired state.  

SIMILAR QUESTIONS

Q1

Which of the following is the smallest in size?

Q2

The smallest among the following ions is

Q3

In the isoelectronic species the ionic radii (Å) of N3–, O2– and F are respectively given by   

Q4

The trivalent ion having largest size in lanthanide series is

Q5

Which of the following elements will have the lowest first ionisation energy?

Q6

A sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configuration 

Q7

The correct order of ionisation energy for comparing carbon, nitrogen and oxygen is

Q8

Which of the following isoelectronic ions has lowest ionisation energy? 

Q9

If the IP of Na is 5.48 eV, the ionization potential of K will be 

Q10

Which of the following have highest electron affinity?