Question

Nitrogen dioxide is reduced to nitrogen and oxygen in presence of finely divided:
A. Calcium
B. Potassium
C. Platinum
D. Carbon

Answer 1

Answer:

carbon

Explanation:

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Answer 2

C) Platinum

Explanation:

Nitrogen oxide is reduced to nitrogen and oxygen in the presence of finely divided platinum or palladium as a catalyst.  

2NO2 ---platinum--->  N2 + 2O2

This technology is used to reduce vehicular pollution by reducing the NOx emissions. But since platinum is expensive, the technology is very costly. So, it has led to the development of technologies that can explore the use of other cheaper methods to reduce vehicular emissions.