What are the measures required for the reduction of the following emissions from diesel engine?

Question

(i) What are the effects of the following additives that are added to petrol to improve its combustion and other characteristics?

1. Antioxidant                                      2. Corrosion inhibitor

3. Anti icing agent                                4. Antiknock agent

5. Metal deactivator                                                                                                   

(ii) What are the measures required for the reduction of the following emissions from diesel engine?

1. Particulate Emission                         2. Smoke Emission

3. NO_x Emissions                                 4. HC Emissions

5. SO_x Emissions