Assertion : Suspended particulate matter (SPM | vedclass

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Question

(B) $SPM$ (Suspended Particulate Matter) consists of fine particles floating in the air with a diameter below $10 \ \mu m$. Diesel vehicles are a majo

Vedclass · Accepted Answer

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

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(B) $SPM$ (Suspended Particulate Matter) consists of fine particles floating in the air with a diameter below $10 \ \mu m$. Diesel vehicles are a major source of $SPM$ emissions due to incomplete combustion of fuel. Thus,the Assertion is correct.Catalytic converters are devices installed in automobiles to reduce the emission of harmful gases like carbon monoxide $(CO)$,hydrocarbons,and nitrogen oxides $(NO_x)$ by converting them into less harmful substances. While they are effective at reducing gaseous pollutants,they do not specifically target $SPM$ (which is particulate matter). Therefore,the Reason is a correct statement,but it does not explain why $SPM$ is released by diesel vehicles. Thus,the correct option is $B$.

Assertion : Suspended particulate matter $(SPM)$ is an important pollutant released by diesel vehicles.
Reason : Catalytic converters greatly reduce pollution caused by automobiles.

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Assertion : Suspended particulate matter $(SPM)$ is an important pollutant released by diesel vehicles.Reason : Catalytic converters greatly reduce pollution caused by automobiles.