Which of the following shows little or no net reaction when the volume of the system is decreased?
A.
2O3(g) ⇔ 3O2(g)
B.
H2(g) + I2(g) ⇔ 2HI(g)
C.
2NO2(g) ⇔ N2O4(g)
D.
PCl5(g)⇔ PCl3(g) + Cl2(g)
Answer: B
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