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General Principles & Processes of Isolation of Elements -CBSE Class 12th NCERT Solution

Jul 30, 2013 15:23 IST

    Get, detailed solutions to the questions of the chapter General Principles and Processes of Isolation of Elements from NCERT textbooks. The objective is to helping students regarding the pattern of answering the question as per the cbse latest marking scheme.Cbse.jagranjosh.com provided you NCERT solutions for classes 12th math and science subjects.

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    Some questions of this chapter are given here

    Q. Out of C and CO, which is a better reducing agent at 673 K?

    Answer

    At 673 K, the value of free enthalpy change for CO to convert into carbon monoxide that is Δ(CO,CO2)  less than that of ΔG c,co . Therefore, CO can be oxidised more easily to carbon dioxide than Carbon to Carbon monoxide. Hence, CO is a better reducing agent than C at 673 K.

    Q. Name the common elements present in the anode mud in electrolytic refining ofcopper. Why are they so present?

    Answer

    In electrolytic refining of copper, the common elements present in anode mud are: -

    1. Selenium
    2. Tellurium
    3. Silver
    4. Gold
    5. Platinum, and
    6. Antimony

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    These elements are very less reactive. Thus, they are not affected during the purification process. Hence, settle dow

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