Attempt this previous-year question. The correct option stays hidden until you choose.
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.
Pick an option to check yourself.
• Correct Answer: B
• E-waste from computers contains beryllium (motherboards), cadmium (chip resistors, CRTs), chromium (data tapes), mercury (switches, LCD backlights), and lead (solder, CRTs).
• 4 is wrong: Heptachlor is an organochlorine pesticide, not a computer component. 7 is wrong: Plutonium is a nuclear fuel, absent from consumer electronics.
Attempt Prelims MCQs or open Mains questions by paper — then continue the same bank inside the app with visual decks.
GyanGram