47. Due to improper/ indiscriminate disposal of old and used computers or their parts, which of the following are released into the environment as e-waste?
- Beryllium
- Cadmium
- Chromium
- Mercury
Select the correct answer using the codes given below.
Explanation: D. Electronic waste or E-waste has ferrous and nonferrous metals both. Non-ferrous metals like copper, aluminium, silver, gold, platinum, palladium etc. The presence of elements like lead, mercury, arsenic, cadmium, selenium and hexavalent chromium are classified as hazardous waste.