Exposure to extremely high sound level, . . . . . . ,generated during a take off of a jet plane or rocket,may damage ear drums and cause permanent hearing loss.

  • A
    $150$ decibels or more
  • B
    $30$ to $50$ decibels
  • C
    $50$ to $70$ decibels
  • D
    $70$ to $90$ decibels

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$DDT$ is a/an:

Provide the full forms of the following abbreviations:
$(i)$ $GAIL$
$(ii)$ $BOD$

What was the cause of the 'Yusho' disease which occurred in $1968$ due to a leak in a canning factory?

What is the amount of oxygen consumed by bacteria to oxidize all the organic matter present in one liter of water called?

In an aquatic food chain,if a water body has $0.003 \; ppb$ of $DDT$,its maximum concentration can be observed in:

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