Arrnge the following compounds in order of their decresaing stabilities:
`HF, C Cl_(3), HBr, HI, HCl`
(Given `EN` values of element as below)
`H=2.1, F=4, Cl=3.0, Br=2.8, I=2.3, N=3.0`

Explanation

`EN` differences for:
`HF = 4.0 - 2.1 = 1.9`, `NCl_(3) = 3.0 - 3.0 = 0.0`
`HBr = 2.8 - 2.1 = 0.7`, `HI = 2.3 - 2.1 = 0.2`
`HCl = 3.0 - 2.1 = 0.9`.
The greater the differences in `EN`, the greater is the bond energy of the covalent bond and the greater is the stability of the covalent bond.
So, the order of decreasing stability is
`{{:("Compound",),(Delta chi,):}] {:(":" HF gt,HCl gt,HBr gt,HI gt,NCl_(3)),(":"1.9,0.9,0.7,0.4,0.0):}}`