The most hazardous metal pollutant used in automobiles is .....

  • A
    $Hg$
  • B
    $Cd$
  • C
    $Pb$
  • D
    $Cu$

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Thermal pollution of water bodies is due to

Assertion : Organochlorine pesticides are organic compounds that have been chlorinated.
Reason : Fenitrothion is one of the organochlorine pesticides.

Acid rain is caused by,or recent reports of acid rain in some industrial cities are due to the effect of atmospheric pollution by:

Components that bring about undesirable changes in air,water,and land are called:

$A$: High concentration of atmospheric $SO_2$ reduces primary productivity.
$R$: $SO_2$ converts the chlorophyll $a$ into phaeophytin.

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