Which of the following attain the linear structure ?

Options

A. `BeCl_(2)`
B. `NCO^(+)`
C. `NO_(2)`
D. `CS_(2)`

Answer

A, D

Explanation

(a,d) `BeCl_(2)(Cl-Be-Cl)` and `CS_(2)(S=C=S)` both are linear. `NCO^(+)` is non-linear. However, [remember that `NCO(-N=C=O)` is linear because it is isoelectric with `CO_(2)`. `NO_(2)` is angualr with bond angle `132^(@)` and each O-N bond begin of `1.20Å` (intermediate between single and double bond).