Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub
How many statements are correct :
(I) Oxides of nitrogen and sulphur are major contributors to acid rain.
(II) vapour, and are greenhouse gases
(III) Photochemical smog is mixture of ozone, formaldehyde, peroxyacetyl nitrate (PAN) etc.
(IV) Sodium chlorate and sodium arsenite are commonly used as herbicides.
(V) Photochemical smog occurs in warm, dry and sunny climate.
(VI) Classical smog is called as oxidising smog and photochemical smog is called as reducing smog.
(VII) DDT can control the damage caused by insects on plant but due to it's adverse effect on environment it is not preferred insecticide
(VIII) Amount of BOD in water is a measure of the amount of organic matter in water.
Answer:
Solution:
Classical smog → Chemically it is reducing mixture so called as reducing smog. Photochemical smog → It has high concentration of oxidising agents so it is called as oxidising smog.