Dichloro diphenyl __________ is the full form of DDT (an insecticide).

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

Dichloro diphenyl __________ is the full form of DDT (an insecticide).

Related Questions