Iron in Water

What are the two common forms of iron found in water?

• Ferrous and ferric ions

• Elemental and oxide iron

• Sulfide and sulfate iron

• Reductive and oxidative iron

Which type of iron is responsible for causing a reddish-brown color in water?

• Ferrous iron

• Ferric iron

• Sulfide iron

• Oxidative iron

Which method is commonly used to determine iron concentration in water?

• Colorimetric analysis using 1,10-phenanthroline

• Titration with sulfuric acid

• Gravimetric analysis with sodium hydroxide

• Spectrophotometric analysis

What is the permissible limit for iron in drinking water as per the WHO (World Health Organization) guidelines?

• 0.3 mg/L

• 1.0 mg/L

• 5.0 mg/L

• 10.0 mg/L

Which of the following can be a consequence of elevated iron levels in water?

• Increased water clarity

• Corrosion in plumbing systems

• Enhanced taste and odor

• Improved water quality

What is the most common method for removing iron from water?

• Oxidation followed by filtration

• Boiling and evaporation

• Chlorination and dechlorination

• Reverse osmosis

Which of the following is a common symptom of iron contamination in water?

• Increased water softness

• Staining of laundry and plumbing fixtures

• Enhanced water clarity

• Reduced water hardness

What is the primary source of iron in natural water bodies?

• Industrial pollution

• Naturally occurring minerals and rocks

• Agricultural runoff

• Atmospheric deposition