Consider the following statements. When air is heated in an automobile engine, nitrogen oxides (NOx) are produced. Nitric oxide (NO) is a greenhouse gas, which reacts with oxygen to form nitrogen dioxide (NO2). Diesel engines emit fine particulate matter (PM) emissions.Which of the above statements is/are correct?a)1, 2b)1, 3c)2, 3d)1, 2, 3Correct answer is option 'B'. Can you explain this answer?

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Consider the following statements.

When air is heated in an automobile engine, nitrogen oxides (NOx) are produced.
Nitric oxide (NO) is a greenhouse gas, which reacts with oxygen to form nitrogen dioxide (NO₂).
Diesel engines emit fine particulate matter (PM) emissions.

Which of the above statements is/are correct?

a)
1, 2
b)
1, 3
c)
2, 3
d)
1, 2, 3

Correct answer is option 'B'. Can you explain this answer?

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Consider the following statements. When air is heated in an automobile...

When air is heated in an automobile engine, nitrogen oxides (NOx) are produced — these include nitrogen dioxide (NO₂) which is toxic; nitrous oxide (N₂O), which is a greenhouse gas; and nitric oxide (NO), which reacts with oxygen to form the harmful NO₂. Nitric oxide on its own also increases the risk of respiratory problems in the long run.
In a petrol engine, a three-way catalytic converter reduces these emissions, ensuring that the NOx emissions are about 30 per cent lower than they would be in a diesel engine on average.
While modern diesel cars are fitted with particulate filters that take care of NOx emissions (reducing them by 90%, according to some estimates), diesel engines also emit fine particulate matter (PM) in their tailpipe emissions. This is essentially soot, the finest particles of which can be embedded deep in the lungs, and they can cause heart and respiratory problems in the longer term. PM has also been linked to cancer.

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Consider the following statements. When air is heated in an automobile engine, nitrogen oxides (NOx) are produced. Nitric oxide (NO) is a greenhouse gas, which reacts with oxygen to form nitrogen dioxide (NO2). Diesel engines emit fine particulate matter (PM) emissions.Which of the above statements is/are correct?a)1, 2b)1, 3c)2, 3d)1, 2, 3Correct answer is option 'B'. Can you explain this answer?

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