1_In how many types chemical exists

A.2

B.3

C.5

D.7

 

2_In which form chemicals exist

A.Dissolved

B.Absorbed

C.Incorporated

 

D.All of these

3_Amount of chemical substances that is absorbed in the biotic or abiotic compound chemicals are

A.Absorbed chemicals

B.Desolved chemicals

C.Incorporated form of chemical

D.None of these

 

4_Toxic agents that enter in the body of living organisms and cause significant effect on them are called

A.Bio availability

B.Toxicity

C.Biotransformation

D.Turbidity

 

5_How many types of bioavailability

A.2

B.3

C.4

 

6_Time required to chemical for work is called

A.Time span

B.Residence time

C.Steady stat time

D.All of these

 

7_Breakdown of chemicals in the presence of water is called

A Hydrolysis

B.Oxidation

C.Reduction

D.Photolysis

 

8_Addition of oxygen and removel of water is called

A.Reduction

B.Hydrolysis

C.Oxidation

D.Photolysis

 

9_Breakdown of chemical in presence of light is called

A.Oxidation

B.Reduction

C.Hydrolysis

D.Photolysis

 

10_Conversion of molecules to more polar and water soluble form of lower toxicity is known as

Mineralization

A.Transfermation

B.Bio availability

C.Bio degradation

 

11_The complete bio degradation of chemical to carban dioxide,water and simple organic or inorganic end product is called

A.Mineralization

B.Transfermation

C.Bio availability

D.Bio degradation

 

12_It is ratio of the total amount of chemical in a reservoir per unit time

A.Residence time

B.Steady stat residence time

C.Time span

D.All of these

 

13_Amount of chemical that is present in a specific environment and accumulate in the body of living organisms is called

A.Bio availability

B.Environmental  availability

C.Environmental bio availability

D.Toxicological bio availability