Related Questions

Aryl benzene sulphonate (ABS) is a
A Detergent
B Plasticiser for unsaturated polyester
C Starting material for the synthesis of glycerine
D Coating ingredient for photographic film
The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.
A Cationic
B Anionic
C Amphoteric
D Semi polar
A. some towns in Bangladesh are polluted B. All polluted towns should be destroyed C. Town Dhaka should be destroyed D. Town Dhaka is polluted E. Some towns in Bangladesh should be destroyed
A BDE
B BAE
C ADE
D CDB
Each question consists of five statements following by options consisting of three statements put together in a specific order. Choose the option which indicates a valid argument, that is, where the third statement is a conclusion drawn from the preceding two statements. A.Some towns in Bangladesh are polluted .B.All polluted towns should be destroyed.C.Town Dhaka should be destroyed.D.Town Dhaka is polluted.E.Some towns in Bangladesh should be destroyed
A BDE
B BAE
C ADE
D CDB
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
A Decreases
B Increases
C Remains constant
D May increase or decrease ; depends on the chemical characteristics of polluted water
Radioactive substances present in the polluted water stream can be removed by
A Biological oxygen treatment
B Coagulation and filtration
C Adsorption in ion exchange materials
D None of these
In a class of 60 students, 20 students like Math, 25 students like English and 30 students like Science. If 5 Students like both Math and Science, 8 Students like both English and Science and 3 students like neither of these subjects, how many students like all of the three subjects?
A 2
B 3
C 4
D 5
Presence of soluble organics in polluted water causes
A Undesirable plants growth
B Depletion of oxygen
C Fire hazards
D Explosion hazards
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.
A Radioactive
B Organic
C Inorganic
D None of these
Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by
A Natural aeration of water stream
B Photosynthetic action of algae
C Both A & B
D Neither A nor B

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