Related Questions

Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre.
A 2
B 42
C 332
D 1050
Which of the following is not an insecticide?
A Hydrocyanic acid
B Nicotine
C Sodium flouride
D Hexane
Hydrocynic acid (HCN) is used as an insecticide for
A Controlling timber degradation by ants
B Controlling poultry lice
C Potato beetle
D Citrus fruits
Chemical formula of BHC, which is an insecticide is
A C6H6Cl6
B C6Cl6
C C6H5Cl
D C6H4Cl2
DDT উৎপন্ন করতে নিচের কোনটি ব্যবহৃত হয়?
A গাঢ় HNO3 
B গাঢ় H2SO4 
C লঘু H2SO4 
D গাঢ় HCI+HNO3
ডিডিটি (DDT) তৈরিতে কোনটি ব্যবহৃত হয়?
A ক্লোরিন
B ক্লোরাল
C ক্লোরোফরম
D আয়োডোফরম
DDT অণুতে ক্লোরিন পরমানুর সংখ্যা কত?
A 2
B 3
C 4
D 5
Which book written by Rachel Carson resulted in banning DDT in USA?
A Silent spring
B The environmentalism
C Biomagnification
D Food chain
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
A Dilute H2SO4
B Oleum
C Ultraviolet light
D None of these
The chlorinator used in the manufacture of DDT is made of
A Glass
B Glass lined steel
C Teflon
D Bakelite

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