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

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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

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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

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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

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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

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The term biosphere is used for the zone of the earth where life exists

(1) On the lithosphere

(2) In the hydrosphere

(3) In the lithosphere and hydrosphere

(4) In the lithosphere, hydrosphere and atmosphere

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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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