Heavy Metals Quiz

What is the maximum limit of mercury in domestic water supply according to EPA's criteria?

• 2.0 ppb

• 0.05 ppb

• 0.1 ppb

• 1.0 ppm

Which of the following metals is classified as a heavy metal?

• Potassium

• Calcium

• Copper

• Sodium

What is the atomic number of lead?

• 76

• 82

• 80

• 78

Which of the following is a characteristic of alkaline earth metals?

• Form cations with charge +2

• All are gases at room temperature

• Soft and silver-colored

• Highly reactive

What is bioaccumulation?

• Excretion of toxins from the body

• Absorption of nutrients from food

• Decrease in concentration of a substance in the environment

• Increase in concentration of a substance in certain tissues

Which of the following metals is known to cause Minamata disease?

• Mercury

• Cadmium

• Zinc

• Lead

What is the primary source of mercury pollution in water?

• Agricultural runoff

• Urban runoff

• Atmospheric deposition

• Industrial waste

What is the recommended action level for methylmercury in fish?

• 2.0 ppm

• 0.05 ppm

• 0.1 ppm

• 1.0 ppm

Which of the following metals is nonessential and has high toxicity potential?

• Copper

• Cadmium

• Zinc

• Aluminum

What is the effect of salinity on metal uptake rates in aquatic organisms?

• Increases with temperature

• No effect

• Decreases with salinity

• Increases with salinity