In the air, N2 and O2 occur naturally but they do not react to form oxides of nitrogen because:
Correct answer: C. The reaction is endothermic
- A. Oxides of nitrogen are unstable
- B. Catalyst is required for the reaction
- C. The reaction is endothermic
- D. N2 and O2 do not react with each other
Explanation
The reaction between N2 and O2 is endothermic and requires high temperature hence it does not take place naturally in air.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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