Chemical Properties

Question 1

Why are noble gases least reactive?

Answer 1

Noble gases are least reactive due to following reasons
1. Completely filled Valence shell
2. High Ionization enthalpy and large +ve electron gain enthalpy

Question 2

How did Neil Barlett create a xenon compound?

Answer 2

-Neil Barlett (1962) main ek red compound banaya ——> O2+PtF6-
-Usne notice kiya ki Ionization enthalpy of O2(1175KJ/mol) kaafi similar hain to Xe(1170KJ/mol)
- He then created a similar red color compound with Xe —–> Xe+PtF6-

Question 3

Xe can make compounds with?

Answer 3

Xe can form compounds with only Oxygen and fluorine

Question 4

Kr can form compound with only?

Answer 4

Kr can form compound with only Fluorine
Compound- KrF2

Question 5

Why do noble gases not form anions?

Answer 5

Noble gases do not form anions
Reason- Since the electron affinity of these elements are taken as zero, they do not have any tendency to accept electrons

Question 6

Noble gases do not form cations. why?

Answer 6

Noble gases do not form cations
Reason- Since noble gases have high ionization enthalpy, they have little tendency to lose electrons