1.

Arragne the following in decreasingorder of bond angle

Answer»

`NH_3 gt NF_3 gt PF_3 gt PH_3`
`NF_3 gt PF_3 gt NH_3 gt PH_3`
`NF_(3) gt NH_(3) gt PH_3 gt PF_3`
`PH_(3) gt PF_(3) gt NH_3 gt NF_3`

Solution :Bond angle `ALPHA ` Electronegativity of central atom.
alpha`{:(""1),(BAR"Electronegativity of"),("Halogen (or) Hydrogen"):}`
`{:(NF_3gtPF_3),(NH_3gtPH_3):}impliesNH_3gtPF_3 " "PF_3gtPH_3:.{:(NH_3,gtNF_3,gtPF_3,gtPH_3),(107^(0)28.,102^(0)2.,96.3^(0),93^(0)36.):}`


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