JAMB - Chemistry (1992 - No. 26)
Which of the following equilibria shows little or no net reaction when the volume of the system is decreased?
H2(g) + I2(g) ≈ 2HI(g)
2NO2(g) ≈ N2O4(g)O4(g)N2O4(g)
PCI5(g) ≈ PCI3(g) + CI2(g)
ZnO(s) + CO2(g) ≈ ZnCO3(g)