Home
Class 12
CHEMISTRY
Define the teams Sink, COD, BOD, TLV and...

Define the teams Sink, COD, BOD, TLV and receptor.

Text Solution

Verified by Experts

Sink: The medium Which reacts with pollutants is called sink.
Ex: Sea water is a big sink for `CO_2`.
COD : The amount of oxygen required to oxidise organic substances present in polluted water is called Chemical Oxygen Demand. It is an important parameter for determining the quality of water.
BOD : The amount of oxygen used by the suitable microorganisms present in water during five days at `20^(@)C` is called Biochemical Oxygen Demand (BOD).
TLV : The minimum level of the toxic substances or pollutants present in the atmosphere which affects a person adversely when he is exposed to this for 7 - 8 hrs. in a day is called Threshold Limit Value (TLV).
Receptor : The medium which is affected by a pollutant is called receptor.
Ex : Eyes of drivers of two wheelers (or) Four wheelers when they are stopped at signal centres.
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL CHEMISTRY

    VGS PUBLICATION-BRILLIANT|Exercise LONG ANSWER QUESTIONS|6 Videos

  • ENVIRONMENTAL CHEMISTRY

    VGS PUBLICATION-BRILLIANT|Exercise LONG ANSWER QUESTIONS|6 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

    VGS PUBLICATION-BRILLIANT|Exercise Long Answer Questions|24 Videos

  • HYDROGEN AND ITS COMPOUNDS

    VGS PUBLICATION-BRILLIANT|Exercise Long Answer Questions|20 Videos

Similar Questions

Explore conceptually related problems

Define TLV .

Define sink and receptor.

What are DO, COD and BOD ?

Define the terms 'Receptor' and 'Sink'.

Define the following terms and give two examples each. a) Pollutant b) Contaminent c) Sink d) Receptor and e) Speciation

Among the following, find.the number of correct statements? Sea water and trees are big sinks for carbondioxide. Geater the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) values, greater is the extent of pollution. Lesser the threshold limit value (TLV), greater the toxicity Ozone layer present in stratosphere acts as protective umbrella form hamful sunrays. Flouride ion in drinking water is detected by using zirconium alizarin - S dye. The dye loses its colour in the presence of flouride. Human ear can tolerate the sound upto the intensity 60 decibles.

(A): Efficiency of carnot engine increase on reducing the temperature of sink. (R ): The efficiency of a Carnot engine is defined as ratio of net mechanical work done per cycle by the gas to the amount of heat energy absorbed per cycle from the source.

The manner in which values of BOD and COD change, as water pollution increases in a stream

{:("List-I","List-II"),((A)"Pollutant but not contaminant ",(I)"Methyl isocyanate "),((B)"Contaminant in Bhopal gas tragedy",(II) CO_(2)),((C)"Receptor to smoke of automobiles",(III)"Human eyes"),((D)"Sink to dry leaves and garbage",(IV)"Microorganisms"),(,"(V) Mercury"):}