Peroxyacetyl nitrate (PAN) is a secondary pollutant. It is formed in the atmosphere when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight. PAN is a major component of smog and can cause respiratory problems, eye irritation, and damage to plants.
An acidic dye is a dye that is acidic in nature. Acidic dyes are used to color fabrics and other materials. They are typically made from organic compounds that contain sulfur or nitrogen. Acidic dyes can be harmful to the environment if they are not properly disposed of.
A plant hormone is a chemical that controls the growth and development of plants. Plant hormones are produced in small amounts by plant cells and are transported throughout the plant. Plant hormones play a role in a variety of plant processes, including cell division, cell elongation, leaf development, and flowering.
Vitamin D is a nutrient that is essential for human health. Vitamin D is found in a few foods, such as fatty fish and egg yolks, and it is also produced by the body when exposed to sunlight. Vitamin D is important for bone health, immune function, and cell growth.
In conclusion, the correct answer to the question “Peroxyacetyl nitrate is a” is “secondary pollutant.”