Question

What is the most probable scientific explanation behind the Euro 4 standards having no limit on the particulate matter (PM) emitted by vehicles that run on petrol? Option a.) Petrol vehicles did not emit PM. Option b.) PM emitted by petrol vehicles was less harmful than diesel vehicles. Option c.) PM from petrol vehicles was not likely to have harmful effects. Option d.) Car manufacturers had designed petrol engines that did not emit PM.​

Answer 1

Explanation:

Correct option is

A

Rs 13

Costof20dozenbananas=208

fordozenofthebananawereratio

letnewratioofbananatobex

now,

Byquestion

costof16dozenbanans=costof20banana

16×x=208

x=

16

208

x=13

Answer 2

Answer:

PM emitted by petrol vehicles was less harmful than diesel vehicles is the most probable scientific explanation. Option b.) is correct.

Explanation:

• Carbon monoxide, nitrogen oxides, and other organic compounds are the pollutant particles emitted by vehicles.
• If the PM level is high, it is very dangerous for living organisms and the ecosystem.

Diesel vehicles are on average more polluting than petrol vehicles. The fine particles and carbon dioxide emitted by diesel vehicles are more than that of petrol vehicles. This is because diesel vehicles are bigger in size.

So, the most probable scientific explanation behind the Euro 4 standards having no limit on the particulate matter (PM) emitted by vehicles that run on petrol is PM emitted by petrol vehicles was less harmful than diesel vehicles.

Option b.) is correct.