First slide

Water Pollution and its Control

Question

The waste water from industries may contain toxic heavy metals having density of more than

Easy

A

5 g / cm³
B

10 g / cm³
C

2 g / cm³
D

15 g / cm³

Solution

Waste water from industries like petroleum, paper manufacturing, metal extraction and processing, chemical manufacturing, etc., often contain toxic substances, notably, heavy metals (defined as elements with density > 5 g/cm³ such as mercury, cadmium, copper, lead, etc.) and a variety of organic compounds.

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