345369 Assertion :
Population density indicatororganisms shows the degrees of waterpollution.
Reason :
Low BOD indicates presence of lesswaste in water.

345370 Statement A :
Algal blooms cause deterioration of the water quality and fish mortality.
Statement B :
\(Eichhornia\,\,crassipes\) is called the "Terror of Bengal"

345371 Read the following statements
I. Motor vehicles equipped with catalytic converter should use unleaded petrol because lead in the petrol inactivates the catalyst.
II. DDT is a non - biodegradable pollutant
III. Catalytic converters convert the unburnt hydrocarbons into \(\mathrm{CO}_{2}\) and water Which of the following is incorrect

345372 Relationship between DO (dissolved oxygen) and BOD is that, they

345369 Assertion :
Population density indicatororganisms shows the degrees of waterpollution.
Reason :
Low BOD indicates presence of lesswaste in water.

345370 Statement A :
Algal blooms cause deterioration of the water quality and fish mortality.
Statement B :
\(Eichhornia\,\,crassipes\) is called the "Terror of Bengal"

345371 Read the following statements
I. Motor vehicles equipped with catalytic converter should use unleaded petrol because lead in the petrol inactivates the catalyst.
II. DDT is a non - biodegradable pollutant
III. Catalytic converters convert the unburnt hydrocarbons into \(\mathrm{CO}_{2}\) and water Which of the following is incorrect

345372 Relationship between DO (dissolved oxygen) and BOD is that, they

345369 Assertion :
Population density indicatororganisms shows the degrees of waterpollution.
Reason :
Low BOD indicates presence of lesswaste in water.

345370 Statement A :
Algal blooms cause deterioration of the water quality and fish mortality.
Statement B :
\(Eichhornia\,\,crassipes\) is called the "Terror of Bengal"

345371 Read the following statements
I. Motor vehicles equipped with catalytic converter should use unleaded petrol because lead in the petrol inactivates the catalyst.
II. DDT is a non - biodegradable pollutant
III. Catalytic converters convert the unburnt hydrocarbons into \(\mathrm{CO}_{2}\) and water Which of the following is incorrect

345372 Relationship between DO (dissolved oxygen) and BOD is that, they

345369 Assertion :
Population density indicatororganisms shows the degrees of waterpollution.
Reason :
Low BOD indicates presence of lesswaste in water.

345370 Statement A :
Algal blooms cause deterioration of the water quality and fish mortality.
Statement B :
\(Eichhornia\,\,crassipes\) is called the "Terror of Bengal"

345371 Read the following statements
I. Motor vehicles equipped with catalytic converter should use unleaded petrol because lead in the petrol inactivates the catalyst.
II. DDT is a non - biodegradable pollutant
III. Catalytic converters convert the unburnt hydrocarbons into \(\mathrm{CO}_{2}\) and water Which of the following is incorrect

345372 Relationship between DO (dissolved oxygen) and BOD is that, they