Due to improper/indiscriminate disposal of hold and used computers or their parts, which of the following are released into the environment as e-waste?1. Beryllium2. Cadmium3. Chromium4. Heptachlor5. Mercury6. Lead7. PlutoniumSelect the correct answer using the codes given below:
✓ Correct answer: b) 1, 2, 3, 5 and 6 only
ExplanationE-waste is any electrical or electronic equipment that’s been discarded.Recently, India’s first e-waste clinic was inaugu- rated in Bhopal.Environment and Ecology 493 E-waste Sources Constituents PCBs, glass panels, and Computer monitors Lead Resistors & Semiconductors Cadmium Relays and switches, &PCBs Mercury Galvanised steel plates & decorator or hardener Chromium Cabling, Computer & housing Plastics & PVC Electronic equipments & circuit boards Brominated flame-retardants Front panels of CRTs Barium, Phospho- rus & Heavy metals Copper wires, PCB tracks Copper Nickel Cadmium batteries Nickel Lithium-ion battery Lithium Motherboards Beryllium Options 1, 2, 3, 5 and 6 are correct: All elements in these op- tions are the harmful constituents that are released into the envi- ronment due to improper disposal of e-waste.Option 4 is incorrect: Heptachlor is a pesticide classified under Persistent Organic Pollutants (POPs) per the Stockholm Conven- tion.It is unrelated to e-waste.Option 7 is incorrect: Plutonium, while used in some industri- al and military applications, is a radioact
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