Home
Class 11
CHEMISTRY
Assertion: Suspended particulate matter(...

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

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

B

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

C

If the assertion is true but the reason is false

D

If both the assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
B
SPM (Suspended Particulate Matter) is defined as particles floating in the air with a diameter is below `10 mu` . Studies have shown that high SPM concentrations in the air can have a detrimental impact on respiratory organs. SPM is generated from natural sources (e.g., volcanoes or dust storms) and human activities (vehicles, incinerators and industrial plants).

Catalytic converter is a device designed to reduce the amount of emissions from automobiles. The current (so-called three-way) systems use a heated metal catalyst to reduce the emissions of carbon monoxide (CO), hydrocarbons, and nitric oxide (NO), all of which contribute to the formation of photochemical smog. In an automobile.s exhaust system, a catalytic converter provides an environment for a chemical reaction where unburned hydrocarbons completely combust. Hence the combustion process continues but outside the engine combustion chamber where no useful energy is extracted. Toxic car gases such as unburned hydrocarbon (UHC) and carbon monoxide (CO) would not exist if the fuel to energy conversion in the engine were perfect.
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL CHEMISTRY

    ERRORLESS|Exercise PAST YEARS QUESTIONS|17 Videos

  • CLASSFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

    ERRORLESS|Exercise Assertion & Reason |14 Videos

  • GENERAL ORGANIC CHEMISTRY

    ERRORLESS|Exercise ASSERTION AND REASON|14 Videos

Similar Questions

Explore conceptually related problems

Assertion (A): A Suspended Particulate Matter (SPM) is an important pollutant released by diesel vehicles. Reason (R): Catalytic converters greatly reduce pollution caused by automobiles.

Assertion : Catalytic converters must be used in cars. Reason : Catalytic converter helps to reduce the formation of acid rain.

What pollutants are released by motor vehicles? How can we minimize damage caused by them?

How do automobiles filled with catalytic converters reduce air pollution ? Suggest the best fuel for such vehicles.

Assertion : Biological control of pests is advantageous. Reason : It does not cause pollution .

With its very large population of vehicular traffic, Delhi is one of the most polluted cities of the world. Which of the following steps were taken by the government to reduce vehicular pollution in Delhi ? (i) Switching over the entire fleet of public transport i.e., buses, autorickshaws, from diesel to CNG (ii) Phasing out of old vehicles (iii) Use of unleaded petrol in vehicles (iv) Use of low sulphur petrol and diesel in vehicles (v) Use of catalytic converters in vehicles (vi) Application of stringent pollution level norms for vehicles such as Euro-II norms, etc.