Which of the following metal can not be recovered from manual recycling process of e-wastes ?

Mercury

The correct answer is Option (2) -Mercury

Irreparable computers and other electronic goods are known as electronic wastes (e-wastes). E-wastes are burried in landfills or incinerated. Over half of the e-wastes generated in the developed world are exported to developing countries, mainly to China, India and Pakistan, where metals like copper, iron, silicon, nickel and gold are recovered during recycling process. Unlike developed countries, which have specifically built facilities for recycling of e-wastes, recycling in developing countries often involves manual participation thus exposing workers to toxic substances present in e-wastes. Recycling is the only solution for the treatment of e-waste, provided it is carried out in an environment- friendly manner.