The decreasing order of thermal stability is `CsOH GT RbOH gt KOH gt NaOH` The decreasing order of BONDANGLE is `BF_(3) gt PF_(3) gt ClF_(3)` The decreasing order of bond dissociation ENERGY is `Cl_(2) gt Br_(2) gt F_(2) gt I_(2)` The decreasing order of melting point is `NH_(3) gt (CH_(3))_(2) NHgt CH_(3)NH_(2) gt (CH_(3))_(3)N`