Question

Assertion :The catalytic converter in the car's exhaust systems converts polluting exhaust gases into non-toxic gases. Reason: Catalytic converter contains a mixture of transition metals and their oxides embedded in inner support.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion and Reason both are incorrect
  

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

A catalytic converter is a device that uses a catalyst to convert three harmful compounds in car exhaust into harmless compounds. The three harmful compounds are a hydrocarbon (in the form of unburned gasoline), carbon monoxide (formed by the combustion of gasoline) and nitrogen oxide (created when the heat in the engine forces nitrogen in the air to combine with oxygen).
In a catalytic converter, the catalyst (in the form of platinum and palladium) is coated onto a ceramic honeycomb or ceramic beads that are housed in a muffler-like package attached to the exhaust pipe. The catalyst helps to convert carbon monoxide into carbon dioxide. It converts the hydrocarbons into carbon dioxide and water. It also converts the nitrogen oxides back into nitrogen and oxygen.
The catalytic converter works as heterogeneous type catalysis.

The reactions are as follows:
$2CO\left(g\right)+O_2\left(g\right)\stackrel{Catalyst\left(s\right)}{\to }2C{O}_2$
$Hydrocarbons\left(l\right)+O_2\left(g\right)\stackrel{Catalyst\left(s\right)}{\to }C{O}_2+H_{2}O$
$2NO\left(g\right)\stackrel{Catalyst\left(s\right)}{\to }{N}_2+O_2$