Due to improper/indiscriminate disposal of hold 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:
This questions was previously asked in
UPSC CSP Previous Year Paper (2013)
1, 3, 4, 6 and 7 only
Incorrect Answer 1, 2, 3, 5 and 6 only
Correct Answer2, 4, 5 and 7 only
Incorrect Answer 1, 2, 3, 4, 5, 6 and 7
Incorrect AnswerExplanation:
Beryllium is used in circuit board, Hard disk drive, Motherboard, Mercury is a key part of some modern technologies, including LCD screens ,Laptop and computers. Plutonium is radioactive and hence not used in day to day computer/electronic items as such Heptachlor is an organochlorine compound that was used as an insecticide. So Option 4 is wrong.
Eliminating Plutonium and Heptachlor from the options, only one option left i.e. Option B
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By: Abhipedia