Question

Large quantities of sewage is generated everyday in cities and towns, which is treated in Sewage Treatment Plants (STPs) to make it less polluted. Given below is the flow diagram of one of the stages of STP.
Observe the given flow diagram and answer the questions accordingly.
Observe the diagram of the catalytic converter and answer the questions which follow:
a.) Name any two metals used as catalyst in the catalytic converter.
b.) Name the gases that are released after passing the exhaust hydrocarbons through the catalytic converter.
c.) Name the other poisonous gas which is missing (?) in the exhaust pollutant of an automobile in the above diagram?

Answer 1

Explanation:

name for real names of earth soil water air fire which four gases constitute only the percent of total volume of the atmosphere

Answer 2

Sewage treatment  plants

Explanation:

a). Platinum-palladium and Rhodium both are metals used as catalyst in the catalytic converter for the treatment of Sewage

b). Carbon dioxide($CO_{2}$) and carbon monoxide (CO)  gases that are released after passing the exhaust hydrocarbons through the catalytic converter.

c). Nitric Oxide (NO) is a poisonous gas is missing in the exhaust pollutant of an automobile.