Which of the following attain the linear structure :

1.	Which of the following attain the linear structure :
Answer» `BeCl_(2)` `NCO^(+)` `NO_(2)` `CS_(2)` Solution :(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 isoelectronic with `CO_(2)`. `NO_(2)` is ANGULAR with bond angle `132^(@)` and each O - N bond length of 1.20 Å (intermediate between single and DOUBLE bond) .

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