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Photochemical smog :...

Photochemical smog :

A

occurs in cool, humid climate

B

occurs in warm, dry and sunny climate

C

is a mixture of smoke, fog and `SO_(2)`

D

All

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Assertion : Photochemical smog is mainly composed of nitrogen oxides, volatile organic compounds, ozone and peroxyacyl nitrates. Reason : Photochemical smog develops in cold weather conditions by the interaction of secondary pollutants.

Identify the correct statements., (i) Winter smog is reducing in nature due to presence of particular carbon and SO_(2) (ii)The pollutant obtained from emission tubes of diesel engines is benzopyrene. (iii) Photochemical smog is made up of PAN , O_(3) and oxides of nitrogen (iv) CFCs are stable in troposphere and act as pollutants in stratosphere

Some sources of pollutants and their effects are given. Using the information, fill in the spaces in the table given below. Each pollutant may have more than one source and may show more than one effect. Pollutant Sources: Automobile exhaust, Burning of fossil fuels, Refrigerant, Agricultural field, Fire extinguisher, Paint solvents, Deforestation, Plastic foam. Effects: Photochemical smog, Acid deposition, Global warming, Ozone depletion

How can you apply green chemistry for the following ? (a) To control photochemical smog. (b) To avoid use of halogenated solvents in dryclening and that of chlorine in bleaching. (c ) to reduce use of synthestic detergents. (d) To reduce the consumption of petrol and diesel.

Read the following statements regarding the PAN (Peroxyacyl nitrates) and select the correct ones. (i) It is a secondary pollutant present in photochemical smog. (ii) It is produced by photochemical reactions between hydrocarbons and nitrogen oxides in the presence of sulight or UV radiations. (iii) It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas. (iv) It is a lacrymatory substance, causing irritation of eyes.

What is the nature of photochemcial smog ?

Classical smog is

Classical smog was first observed in

The basic component of smog is:

Los Angeles smog is

VMC MODULES ENGLISH-ENVIRONMENTAL CHEMISTRY-Level-2
  1. Classical and photochemical smog are :

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  2. Photochemical smog :

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  3. The common components of photochemical smog besides ozone and nitric o...

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  4. Photochemical smog causes serious health problems such as :

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  5. Photochemical smog leads to :

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  6. The upper stratosphere consists of considerable amount of X. X protect...

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  7. Ozone in the stratosphere is formed in the following manner :

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  8. Which of the following statements are incorrect ?

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  9. Which of the following chemicals cause depletion of the ozone layer ?

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  10. CFCs or freons : I. are highly reactive II. Non flammable ...

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  11. The CFCs are used in refrigerators, air conditioners, in the productio...

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  12. In 1980s atmospheric scientists working in Antarctica reported about d...

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  13. With the depletion of ozone layer more UV radiation filters into the t...

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  14. Pollution of water originates from human activities. Through different...

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  15. The most serious water pollutants are the disease causing agents calle...

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  16. Which of the following water pollutants are organic wastes ?

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  17. Ifthe concentration of dissolved oxygen in water is below X ppm, the g...

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  18. The amount of oxygen required by bacteria to break down the organic ma...

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  19. What is % by volume occupied by CO(2) in atmosphere ?

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  20. Depletion of ozone layer causes

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