Nitrogen Dioxide

Q. Which one of the following species attracts to an external magnetic field ?

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Q. Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of:

1. $NO$
2. $N{O}_2$
3. $N_{2}O$
4. $N_2{O}_4$

Q.

Which oxide of nitrogen is paramagnetic?

1. Nitrous oxide

2. Dinitrogen pentoxide

3. Nitrogen dioxide

4. Dinitrogen trioxide

Q. At low temperature, say below $(-{11}^{\circ }C)$ nitrogen dioxide exist as a trimer.

1. True
2. False