Pseudohalides

Q. Which of the following species are pseudohalides?
$C{N}^{\ominus },SC{N}^{\ominus },OC{N}^{\ominus },acac,S{O}_3^{2-},S_2{O}_3^{2-},en,N{C}^{\ominus },TeC{N}^{\ominus },N_3^{\ominus },C{O}_3^{2-}$

Q. Which of the following is not a pseudo halide?

1. 
2. 
3. 
4. 

Q. Pseudo halides should have at least one Nitrogen present in them – True or False?

1. False
2. True

Q. How many of the following are pseudohalogens?
Azidocarbon disulphide, Isocyanide ions, Fluminate ion, Tellurocynante ion, Oxycyanogen, Selenocyanogen.

Q. Which of the following ions does not have S-S linkage?

1. $S_2{O}_8^{2-}$
2. $S_2{O}_6^{2-}$
3. $S_2{O}_5^{2-}$
4. $S_2{O}_3^{2-}$

Q. Which of the following species are pseudohalides?
$C{N}^{\ominus },SC{N}^{\ominus },OC{N}^{\ominus },acac,S{O}_3^{2-},S_2{O}_3^{2-},en,N{C}^{\ominus },TeC{N}^{\ominus },N_3^{\ominus },C{O}_3^{2-}$

Q. $F{N}_3$ is one of the most explosive and thermally unstable covalent azide known.
$H{N}_3+F_2\underset{pressure}{\overset{low}{\to }}F{N}_3$
Find the maximum number of atoms in one plane in $F{N}_3$ ___

Q.

Among the following, which qualifies as a pseudohalogen?

1. Oxygen

2. Oxygen

3. Cyanide

4. Cyanogen