Fsc Part 2 Chemistry Online Test-Chapter 16 Environment Chemistry | ilmkidunya

Chemistry Fsc Part 2 Chapter 16 Online Test

Sr. #	Questions	Answers Choice
1	The colloidal particles in raw water can be removed by	Coagulation Aeration Chlorination Hydration
2	A quality of raw water is improved by	Reduction Aeration Dehydration Incineration
3	Whcih water will be considered as polluted water.	High value of COD Low value of COD High value of DO Low value of BOD
4	Ozone depletion in stratosphere region is mainly due to the reaction of O3 with	O2 SO2 CFCs All of these
5	Ozone is mostly produced in	Tropical region North polar region South polar region Thermosphere zone of atmosphere
6	The normal amount of overhead ozone is.	300 DU 350 DU 400 DU 450 DU
7	Thickness of the atmosphere is	100 km 500 km 1000 km 1500 km
8	The thickness of ozone layer is.	25 to 50 km 25 to 28 km 3 km only 1 km only
9	In which layer of atmosphere, ozone is present.	Thermosphere Mesosphere Stratosphere Troposphere
10	Photochemical smog mainly consist of	Higher hydrocarbons Oxidising agnts Reducing agent All of these
11	Acid rain fist of all was observed by	Augus Smith Robert Hook Mosley Watson
12	Which one of the following is secondary pollutant of atmosphere.	CO NO2 SO2 H2SO4
13	The yellowish colour in photochemical smog is due to the presence of.	NO NO2 SO2 CO2
14	The smog which have high contents of SO2 in it, is called.	Reducing smog Oxidizing smog Natural smog Neutral smog
15	The mean residence time of methane in atmosphere in	1-2 years 3-4 years 3-5 years 3-7 years
16	Which field produces significant amount of methane in the atmosphere	paddy field Cotton field Can sugar field Wheat field
17	The residence time of NO is	Few hours 1 day 3 days 4 days

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