Q.In the E-waste generated by the mobile phones, which among the following metal is most abundant ?

E-waste (electronic waste) describes discarded electrical/electronic devices, their components, and substances involved in their manufacture or use, including items destined for reuse, resale, salvage, recycling or disposal. Disposal is a growing problem because electronic equipment routinely contains hazardous substances -- a personal computer may carry lead in its CRT and solder, mercury in switches/housing, and cobalt in steel parts -- and much e-waste is PCB (polychlorinated biphenyl)-based and non-degradable. Copper is the most abundant metal by mass in mobile-phone e-waste. Unauthorise …