Question

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

Solution

Correct option is

Cl2, F2 and Br2

 

The electron affinity (in kJ/mol),

               Fluorine = 332.6

               Chlorine = 348.5

               Bromine = 324.7

                   Iodine = 295.5  

Chlorine has the highest electron affinity value.  

So, the correct order of electron affinity will be  

                 Cl2 > F2 > Br2

SIMILAR QUESTIONS

Q1

The least stable ion among the following is

Q2

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]

Q3

Which of the following is the most electropositive element?

Q4

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

Q5

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

Q6

The set representing the correct order of ionic radius is

Q7

The pair of elements having approximately equal ionisation potential is

Q8

Which is not the correct order for the stated property?

Q9

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

Q10

Which of the following has the highest second ionisation energy?