Stepway academy is correct because NO2 is a oxidizing agent but SO2 can behave both as oxidizing and reducing agent because its oxidation no. lies between its highest and lowest oxidation state. While SO2 being an antioxidant is a food preservative but NO2 is not a food preservative due to its oxidizing nature
But so2 can be harmful too
Both are correct
Acid rain is right answer
No..option C right
No, actually option a is correct because no2 is used in the preservation of meats like fish etc.
Bt I think opt A.is correct
In que they r saying not common
Toh not common konsi statement hui
Maine pura search kra h individual option it's correct option is C
Opt A hui not common
NO2 me nitrogen +4 oxidation me h ..wo +5me b jaa skta h n +3me b jaa skta h ..to dono reducing hue na.
No option A is correct observe carefully