NEET BIOLOGY

Detailed explanation-1: -The presence of elements like lead, mercury, arsenic, cadmium, selenium, hexavalent chromium, and flame retardants beyond threshold quantities make e-waste hazardous in nature. It contains over 1000 different substances, many of which are toxic, and creates serious pollution upon disposal.

Detailed explanation-2: -Some of the toxic metals used in electronics are antimony, arsenic, beryllium, cadmium, chromium, cobalt, indium, lead, mercury, nickel, and thallium. Several rare elements are also used (Frazzoli et al., 2010). Most of these compounds are released during recycling.

Detailed explanation-3: -Lead (Pb) is one of the major and typical heavy metal pollutants of e-waste, particularly enriched in circuit boards, cathode-ray tubes, solder, and batteries.

Detailed explanation-4: -Mercury, cadmium, lead are found in e-waste. Neon is not found in e-waste.

Detailed explanation-5: -Electronic waste contains elements like cadmium, lead, antimony, nickel and mercury.