Chemistry
A gas 'A' reacts with another gas 'B' in the presence of a catalyst to give a colourless gas 'C'. The gas 'C' when comes in contact with air produces a brown gas 'D'. The solution of 'A' in water turns red litmus blue. Explain the observations.
Ammonia
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Answer
As the 'A' turns red litmus blue it is a base. Now the gas 'A' combines with 'B' in presence of Catalyst to give colourless gas Nitrogen monoxide. It reacts with oxygen to give brown gas which is Nitrogen dioxide. The gases are given as :
A = NH3
B = O2
C = NO
D = NO2
4NH3 + 5O2 4NO↑ + 6H2O + Δ
2NO + O2 ⟶ 2NO2 [brown gas]
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