Question

Which is likely to show inert pair effect?

Solution

Correct option is

Pb

In the heavier elements of group IIIA, IVA and VA the ns2 electrons have extra stability and hence, do not take part in bond formation. The reluctance of s-electron pair to take part in bond formation is known as the inert pair effect. Lead is the element of IVA, hence it shows inert pair effect. Hence, for lead compound +2 oxidation stat is more predominant.

SIMILAR QUESTIONS

Q1

The pair of elements having approximately equal ionisation potential is

Q2

Which is not the correct order for the stated property?

Q3

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

Q4

The electron affinity values (in kg mol–1) of three halogens XY and Z are respectively –349, –333 and –325. Then XY and Z respectively, are

Q5

Which of the following has the highest second ionisation energy?

Q6

The electronic configuration of the element with maximum electron affinity is

Q7

The first ionisation energy of oxygen is less than that of nitrogen. Which of the following is the correct reason for this observation?

Q8

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, K+, Ca2+, Mg2+, Be2+

Q9

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?

Q10

The correct order of the size of iodine species is