Q Explain the reason for the answer.
Which of the following oxide of nitrogen is  thermally most stable? 
  a )   N 2 O 5 b )   N 2 O c )   N O d )   N 2 O 3
 

 Dear student 

NO is the thermally most stable oxide of nitrogen. It decomposes above 10000 C.
the thermal stability  is the stability of a molecule at high temperatures; i.e. a molecule with more stability has more resistance to decomposition at high temperatures

Above room temperature, N2O5 is unstable and decomposes to N2O4 and O2 .
  N2O5  and  N2O3  are the oxides of nitrogen which are acid anhydrides and they react with water to form nitrogen-containing oxyacids.
           N2O5 + H2O  ---->      2HNO2
           N2O3 + H2O ----->  2HNO2
N2O decomposes around 850k.

Regards

 

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