Heavy Metal Contamination
Chemistry ⇒ Environmental Chemistry
Heavy Metal Contamination starts at 10 and continues till grade 12.
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See sample questions for grade 10
Describe one environmental impact of heavy metal contamination in rivers.
Describe one health effect of arsenic contamination in drinking water.
Describe one way governments can help prevent heavy metal contamination.
Explain how heavy metals can enter the food chain.
A factory discharges wastewater containing 0.5 mg/L of cadmium into a river. If the safe limit is 0.01 mg/L, by what factor does the factory exceed the safe limit?
A water sample contains 0.2 mg/L of lead. If the recommended safe limit is 0.01 mg/L, is the water safe to drink?
A river downstream from a mining site is tested for zinc and found to have a concentration of 3.5 mg/L. If the safe drinking water limit for zinc is 2.0 mg/L, calculate the percentage by which the river water exceeds the safe limit.
A soil sample from a playground is found to contain 120 mg/kg of lead. The international safety guideline for lead in soil is 50 mg/kg. By how many mg/kg does the sample exceed the safety guideline?
Which heavy metal is commonly found in batteries and can contaminate soil and water if not disposed of properly? (1) Lead (2) Mercury (3) Cadmium (4) Chromium
Which heavy metal is commonly used in thermometers and is toxic to humans? (1) Lead (2) Mercury (3) Cadmium (4) Chromium
Which heavy metal is most commonly associated with neurological damage in children? (1) Lead (2) Zinc (3) Iron (4) Magnesium
Which of the following heavy metals is essential in trace amounts but toxic at higher concentrations? (1) Iron (2) Zinc (3) Copper (4) All of the above
Fill in the blank: The chemical symbol for cadmium is __________.
Fill in the blank: The chemical symbol for lead is __________.
Fill in the blank: The main source of mercury pollution in the atmosphere is __________.
Fill in the blank: The Minamata disease in Japan was caused by __________ poisoning.
A water sample contains 0.2 mg/L of lead. If the recommended safe limit is 0.01 mg/L, is the water safe to drink?
True or False: All heavy metals are toxic to humans at any concentration.
True or False: Heavy metal contamination can affect both terrestrial and aquatic ecosystems.
True or False: Heavy metal contamination can be detected in both soil and water samples.
