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Organisms And Populations

Question
CBSEENBI12047056
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Photochemical smog formed in congested metropolitan cities mainly consists of:

  • ozone, peroxyacetyl nitrate and NOx

  • smoke, peroxyacetyl nitrate and SO2

  • hydrocarbons, SO2 and CO2

  • hydrocarbons, ozone and SOx

Solution

A.

ozone, peroxyacetyl nitrate and NOx

Photochemical smog mainly consists of ozone, pcroxyacetyl nitrate and different oxide of
nitrogen and hydrocarbons released from different engines. 

Nitric oxide or NO is formed by reaction between oxygen and nitrogen. This reacts with air forming nitrogen dioxide (NO2). This gas absorbs light due to which nitric oxide (NO) and a molecule of nascent oxygen [O] are formed.

NO2 →NO + [O]

This atomic oxygen reacts with unburnt hydrocarbons to give rise to peroxy radicals which after reaction with oxygen form ozone or reacting with NO2 give rise to peroxyacetyl nitrate (PAN).

Some More Questions From Organisms and Populations Chapter

Which of the following interaction both species suffer ?

In which of the following interaction both species are benefitted ?

Fill in the blanks with suitable words :

1. The optimal capacity of the organism to produce offspring is called........................

2. Rapid increase in human population is called........................

3. Mathematical expression of the growth of population is called........................

4. Yeast cells grown in a culture medium show........................growth curve.

5. Main cause of population explosion is........................

State true or false :

Coin one word for the following statements :

1.Organism that can tolerate only a narrow range of salinity.

2. Plants that can survive a wide range of temperature.

3. Interaction of two species in which one is benefited while other is neither benefited nor harmed.

4. Number of births during a given period in the population that are added to the initial density.

5. the process of maintaing a constant body temperature.

A few organisms can tolerate and thrive in a wide range of temperature, they are called........................

Majority of organisms are restricted to a narrow range of temperature, such organisms are called ........................ 

The organisms ideally try to maintain the constancy of its internal environment by the process called........................

Mammals from colder climates have shorter ears and limbs to minimize heat loss. This rule is called........................ 

The parasites that feed on external surface of host organisms are called ........................

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