Problem

Which is wrong statement? a. The decreasing order of thermal stability is

\text{CsOH} > \text{RbOH} > \text{KOH} > \text{NaOH}

b. The decreasing order of bond angle is

\text{BF}_3 > \text{PF}_3 > \text{ClF}_3

c. The decreasing order of bond dissociation energy is

\text{Cl}_2 > \text{Br}_2 > \text{F}_2 > \text{I}_2

d. The decreasing order of melting point is

\text{NH}_3 > (\text{CH}_3)_2\text{NH} > \text{CH}_3\text{NH}_2 > (\text{CH}_3)_3\text{N}