Question

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? 

1. Beryllium 2. Cadmium 3. Chromium 4. Heptachlor 5. Mercury 6. Lead 7. Plutonium 

Select the correct answer using the codes given below. 

(a) 1, 3, 4, 6 and 7 only 

(b) 1, 2, 3, 5 and 6 only 

(c) 2, 4, 5 and 7 only 

(d) 1, 2, 3, 4, 5, 6 and 7

Answer 1

(b) 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.