Question # 1

Ozone depletion in stratosphere region is mainly due to the reaction of O3 with

Choose an answer

O2

SO2

CFCs

All of these

The region of earth capable of supposing life is called.

Choose an answer

Atmosphere

Bisphere

Dithosphere

Hydrosphere

The mean residence time of methane in atmosphere in

Choose an answer

1-2 years

3-4 years

3-5 years

3-7 years

The pH range of the acid rain is.

Choose an answer

7-6.5

6.5-6

6-6.5

Less than 5

In water the concentration of dissolved O₂should be

Choose an answer

1-3 ppm

2-4 ppm

4-8 ppm

8-12 ppm

The pH of unpolluted rain water should be

Choose an answer

5.00

5.60

6.50

7.00

Whcih water will be considered as polluted water.

Choose an answer

High value of COD

Low value of COD

High value of DO

Low value of BOD

A single chloride free radical can destroy how many ozone molecules

Choose an answer

100

100,000

100,00

unlimited

Half mass of atmosphere gases is present in.

Choose an answer

5-6 km distance above the surface of earth

10 km above the surface

100 km above the surface

56 km above the surface

Thickness of the atmosphere is

Choose an answer

100 km

500 km

1000 km

1500 km

Ozone is mostly produced in

Choose an answer

Tropical region

North polar region

South polar region

Thermosphere zone of atmosphere

On earth polar ice caps and glacier contains H2O

Choose an answer

1%

2%

3%

10%

The avoid teh formation of toxic compounds with chlorine which substance is used for disinfecting water.

Choose an answer

KMnO4

O3

Alum

Chloramines

Ecosystem is smaller units of.

Choose an answer

Lithosphere

Hydrosphere

Atmosphere

Biosphere

The yellowish colour in photochemical smog is due to the presence of.

Choose an answer

NO

NO2

SO2

CO2

The smog which have high contents of SO2 in it, is called.

Choose an answer

Reducing smog

Oxidizing smog

Natural smog

Neutral smog

Disinfection of water by chlorine is done by the production of.

Choose an answer

NH2Cl

NCl2

HOCl

NHCl2

More Classes

Other Links

Chemistry Fsc Part 2 Chapter 16 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer