Solution :
The thermal stability of tetrahalides decreases in order $$C{X_4} > Si{X_4} > Ge{X_4} > Sn{X_4}$$ and in terms of same metal with different halides is in order of $$M{F_4} > MC{l_4} > MB{r_4} > M{I_4}.$$
Releted MCQ Question on Inorganic Chemistry >> P - Block Elements
Releted Question 1
The reddish brown coloured gas formed when nitric oxide is oxidised by air is