Which of the following statement is/are correct ?

Options

A. All `III` A group elemts froms trihalide
B. Only `Al` react dirrelly with `N_(2)` at high temperature and form `AIN`
C. Al Passivated by concentrated `HNO_(3)`
D. All `IV A (14^(th))` group elements forms trihalide.

Answer

A, B, C

Explanation

(A)All `13th` group elements forms trihalide even `Tl^(+)` as `TlI_(3)BX_(3)AlCl_(3),GaCl_(3)InCl_(3)TI^(+)(13)^(-)` tri iodide ion
(B)At high temperature only `Al` react directly with `N_(2)` and gives `AIN`
( c)Conc.`HNO_(3)` is oxidising agent, it forms an oxide layers on `Al` surface, this makes all passive towards conc. `HNO_(3)`
(D)Except `Pb`, all `14^(th)` group element froms `MX_(4)` tetrahalides.