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

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"):}