Which of the following pollutants is main product of automobile exhaust?

  • Option 1)

    CO

  • Option 2)

    CO2

  • Option 3)

    NO

  • Option 4)

    Hydrocarbons 

 

Answers (1)

As discussed in

Carbon monoxide -

Produced due to incomplete combustion of carbon and due to metallurgical operations. Mainly released in air by
automobile exhaust.

- wherein

2C_{(s)}+O_{2}\rightarrow 2CO(g)

 

Photochemical smog formation -

Emission of nitrogen oxides and hydrocarbons from automobiles exhausts and solar energy by chain of reactions. NO3 and O3 react with unburnt hydrocarbons to produce formaldehyde, aerolein and proxy-acyl nitrates (PAN)

- wherein

NO_{2}(g)\rightarrow NO\left ( g \right )+O\left ( g \right )

O\left ( g \right )+O_{2}\rightleftharpoons O_{3}(g)

NO(g)+O_{3}\left ( g \right )\rightarrow NO_{2}\left ( g \right )+O_{2}\left ( g \right )

3CH_{4}+2O_{3}\rightarrow 3CH_{2}= O\,(formaldehyde)+3H_{2}O

CH_{2}= CHCH= O\, (Acrolein)

CH_{3}COONO_{2}

            \parallel

            O  (PAN)

 

 CO, NO and hydrocarbon are all produced by automobile exhaust.
Amonth them CO is the main product.


Option 1)

CO

This solution is correct.

Option 2)

CO2

This solution is incorrect.

Option 3)

NO

This solution is incorrect.

Option 4)

Hydrocarbons 

This solution is incorrect.

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