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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

The mixture of compounds A and B is passed through a column of AlX2OX3 by using alcohol as eluant. Compound A is eluted in preference to compound B. Which of the compounds A or B, is more readil

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प्रश्न

The mixture of compounds A and B is passed through a column of \[\ce{Al2O3}\] by using alcohol as eluant. Compound A is eluted in preference to compound B. Which of the compounds A or B, is more readily adsorbed on the column?

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उत्तर

Compound A doesn’t adsorb on the column well and moves down the column with alcohol (eluant), while compound B gets adsorbed well on the column and cannot move down.

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पाठ 6: General Principle and Processes of Isolation of Elements - Multiple Choice Questions (Type - I) [पृष्ठ ८३]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 6 General Principle and Processes of Isolation of Elements
Multiple Choice Questions (Type - I) | Q 35 | पृष्ठ ८३

संबंधित प्रश्‍न

The reaction,

Cr2O3 + 2Al → Al2O3 + 2Cr

 (ΔGθ = -421kJ) is thermodynamically feasible as is apparent from the Gibbs energy value.  Why does it not take place at room temperature?


Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.


Write chemical reactions taking place in the extraction of zinc from zinc blende.


State the role of silica in the metallurgy of copper.


The choice of a reducing agent in a particular case depends on thermodynamic factor. How far do you agree with this statement? Support your opinion with two examples.


In the extraction of copper from its sulphide ore, the metal is formed by the reduction of \[\ce{Cu2O}\] with ______.


In the metallurgy of aluminium ______.


Choose the correct option of temperature at which carbon reduces \[\ce{FeO}\] to iron and produces \[\ce{CO}\].


For the reduction of \[\ce{FeO}\] at the temperature corresponding to point D, which of the following statements is correct?


For the metallurgical process of which of the ores calcined ore can be reduced by carbon?

(i) Haematite

(ii) Calamine

(iii) Iron pyrites

(iv) Sphalerite


Wrought iron is the purest form of iron. Write a reaction used for the preparation of wrought iron from cast iron. How can the impurities of sulphur, silicon and phosphorus be removed from cast iron?


The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnace? Explain by giving reaction.


Write down the reactions taking place in Blast furnace related to the metallurgy of iron in the temperature range 500-800 K.


Explain the following:

Silica is added to the sulphide ore of copper in the reverberatory furnace.


Carbon deposition reaction taking place in ______.


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