${\rm{N}}{{\rm{H}}_3}$ is a better electron donor because the lone pair of electron occupies spherical s-orbital and is less directional

${\rm{P}}{{\rm{H}}_3}$ is a better electron donor because the lone pair of electron occupies $s{p^3}$orbital and is more directional

${\rm{N}}{{\rm{H}}_3}$ is a better electron donor because the lone pair of electron occupies $s{p^3}$orbital and more directional

${\rm{P}}{{\rm{H}}_3}$ is a better electron donor because the lone pair of electron occupies spherical s-orbital and is less directional

$Ca{C_2} + N{H_3}$

$Ca{C_2} + P{H_3}$

$Ca{C_2} + C{a_3}{P_2}$

$C{a_3}{P_2} + P{H_3}$

$P{H_3}$

${H_3}P{O_3} + HCl$

$POC{l_3}$

${H_3}P{O_3}$

$N{H_3}$

$Bi{H_3}$

$As{H_3}$

$P{H_3}$

$Ca{C_2} + CaC{N_2}$

$Ca{C_2} + C{a_3}{P_2}$

$Ca{C_2} + CaC{O_3}$

$C{a_3}{P_2} + CaC{N_2}$

2

4

6

8

N2O5 (highest), N2O (lowest)

NO (highest), N2O5 (lowest)

N2O3 (highest), N2O (lowest)

N2O5 (highest), N2O3 (lowest)

$H_3PO_4$ and $HCl$

$H_3PO_3$ and $HCl$

$H_4P_2O_7$ and $HCl$

$H_3PO_2$ and $HCl$

Copper nitrate and Hydrogen

Copper nitrate and Nitrogen

Copper nitrate, Nitric oxide and water

Copper nitrate, Nitrogen dioxide and water

$sp^3$

$sp^3d$

$sp^3d^2$

$sp^2$

formic acid

acetic acid

chloroacetic acid

dichloroacetic acid