Green chemistry means such reactions which

(a) produce colour during reactions

(b) reduce the use and production of hazardous chemicals

(C) are related to the depletion of ozone layer

(d) study the reactions in plants

Concept Questions :-

Air Pollution - Gaseous Pollutants - Oxides of C and N
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Which one of the following is not a common component of photochemical smog?

(a) Ozone

(b) Acrolein

(c) Peroxyacetyl nitrate

(d) Chlorofluorocarbons

Concept Questions :-

Air Pollution - Smog
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Which one of the following statements regarding photochemical smog is not correct?

(a) Carbon monoxide does not play any role in photochemical smog formation

(b) Photochemical smog is an oxidising agent in character

(c) Photochemical smog is formed through photochemical reaction involving energy

(d) Photochemical smog does not cause irritation in eyes and throat

Concept Questions :-

Air Pollution - Smog
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Which one of the following statements is not true?

(a) Concentration of DO below 6 ppm is good for the growth of fish

(b) Clean water would have a BOD value of less than 5 ppm

(c) Oxides of sulphur, nitrogen and carbon arc the most widespread air pollutant

(d) pH of drinking water should be between 5.5-9.5

Concept Questions :-

Water Pollution - Biological Oxygen Demand
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Biosphere is

(1) In which individual interact to each other

(2) By which life originated

(3) The name of a bird

(4) Organic compound by which life diminishes

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Which is not a renewable source

(1) sunlight

(2) Coal

(3) Water

(4) wind energy

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Noosphere is synonyms of

(1) Environment

(2) Atmosphere

(3) Hydrosphere

(4) Stratosphere

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When biosphere turns into human-dominated environment it is called

(1) Noosphere

(2) Troposphere

(3) Mesosphere

(4) Man sphere 

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The living organisms on or around the earth constitute

(1) Biome

(2) Biosphere

(3) Community

(4) Biocoenosis

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Biosphere refers to 

(1) Plants of the world

(2) Special plants

(3) Area occupied by living beings

(4) Plants of a particular area

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