Environmental Chemistry II: Water : MCQs + Answer Key

Environmental Chemistry II: Water

Q.1) Percentage of sodium chloride in sea water is ?

A. 0.02

B. 97

C. 2

D. Option 5

E. 3.4

Q.2) Which salt does not cause the water to become hard?

A. Magnesium hydrogen carbonate

B. Calcium hydrogen carbonate

C. Sodium chloride

D. Magnesium sulphate

Q.3) Which of the followings is not a water born disease?

A. Hepatitis

B. Typhoid

C. Anemia

D. Dysentery

Q.4) Which one do you like?

A. Option 2

B. Option 1

C. Option 3

D. Option 4

Q.5) Heating calcium hydrogen carbonate produces?

A. All of these

B. CaCO3

C. CO2

D. H2O

Q.6) Which salt causes temporary hardness in water?

A. Calcium sulphate

B. Both calcium sulphate and magnesium sulphate

C. Magnesium hydrogen cabonate

D. Magnesium sulphate

Q.7) Which is used to remove permanent hardness in water?

A. Slaked Lime

B. All of these

C. Boiling water

D. Washing soda

Q.8) The density of water is maximum at

A. 0 oC

B. 4oC

C. -4 oC

D. 100 oC

Q.9) Which one do you like?

A. Option 2

B. Option 4

C. Option 1

D. Option 3

Q.10) Which human activity results in contamination of water bodies?

A. Pesticides

B. All of these

C. Septic tanks

D. Livestock waste

Answer Key

Q.1) 3.4

Q.2) Sodium chloride

Q.3) Anemia

Q.4) Option 1

Q.5) CaCO3

Q.6) Magnesium hydrogen cabonate

Q.7) Washing soda

Q.8) 4oC

Q.9) Option 1

Q.10) All of these

Test You Yourself

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