GATE CE 2014 Set 1 — Question 31

MCQ+1 / -0.33EasyChemical ParametersWater QualityEnvironmental Engineering

Environmental Engineering → Water Quality → Chemical Parameters

Last updated 5 September 2026

Question

Some of the nontoxic metals normally found in natural water are

Correct answer (D) iron, manganese and magnesium Solution Toxic metals commonly found in water include Arsenic (As), Lead (Pb), Mercury (Hg), Cadmium (Cd), and Chromium (Cr). Iron (Fe), Manganese (Mn), and Magnesium (Mg) are common nontoxic metals found in natural water. While they may cause aesthetic issues (like staining or hardness), they are not considered toxic at typical concentrations found in natural sources. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (D) iron, manganese and magnesium Solution Toxic metals commonly found in water include Arsenic (As), Lead (Pb), Mercury (Hg), Cadmium (Cd), and Chromium (Cr). Iron (Fe), Manganese (Mn), and Magnesium (Mg) are common nontoxic metals found in natural water. While they may cause aesthetic issues (like staining or hardness), they are not considered toxic at typical concentrations found in natural sources.

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