UPSC General Studies Sample Paper General Studies Sample Paper-4

  • question_answer
    Which of the following elements are found in the e-waste, which are toxic in nature?
    1. Lead                        
    2. Beryllium          
    3. Arsenic                     
    4. Mercury
    5. Antimony                 
    6. Cadmium           
    7. Plutonium                 
    8. Silicon
    Select the correct answer using the codes given below.

    A)  2, 3 and 5                    

    B)  1, 4, 6 and 8

    C)  1, 2, 3, 4, 5 and 6

    D)        (d) All of these

    Correct Answer: C

    Solution :

    [c] Many hazardous toxic elements are found in e-wastes. Lead used in soldering the circuit board that causes damage of nervous system, beryllium found in battery and are carcinogenic in nature, arsenic used in semi-conductors and is a poisonous element that damage digestive tract. Mercury found in batteries and circuit boards and attack the nervous system, endocrine, system and harm unborn foetus. Antimony used in production of diodes and batteries and as toxic as arsenic. Cadmium is used in soldering semi-conductors and chip resistors that damage lung kidneys and liver. Though silicon is found in e-waste, but is not a potential toxic and plutonium is not found that is radioactive in nature.

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