Which of the following statements is false?

  • A
    Noise causes psychological and physiological distress,including insomnia,increased heart rate,and altered breathing patterns,leading to stress.
  • B
    $A$ sound level of $150 \ dB$ is not harmful to humans.
  • C
    Noise is an air pollutant.
  • D
    Both $B$ and $C$.

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Water logging and soil salinity are some of the problems that have come in the wake of the Green Revolution. Discuss their causes and adverse effects to the environment.

$A$ : $PAN$ is a secondary pollutant.
$R$ : $PAN$ is formed by interaction of nitrogen oxides and hydrocarbons in the absence of light.

What is cultural eutrophication?

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Electrostatic Precipitator $(ESP)$:
$I.$ Is an electrical device to remove particulate matter present in the exhaust of thermal power plant.
$II.$ More than $99\, \%$ particulate matter can be removed by this method.
$III.$ $ESP$ has electrode wires and a stage of collecting plates.
Which of the statements given above are correct?

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