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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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अध्याय 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
अध्याय 6 General Principle and Processes of Isolation of Elements
Multiple Choice Questions (Type - I) | Q 35 | पृष्ठ ८३

संबंधित प्रश्न

How is ‘cast iron’ different from ‘pig iron’?


Is it true that under certain conditions, Mg can reduce SiO2 and Si can reduce MgO? What are those conditions?


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


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.


Write chemical reactions taking place in the extraction of copper from Cu2 S. 


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


Below point ‘A’ \[\ce{FeO}\] can ______.


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?


How is copper extracted from low grade copper ores?


Why is sulphide ore of copper heated in a furnace after mixing with silica?


Explain the following:

\[\ce{CO2}\] is a better reducing agent below 710 K whereas \[\ce{CO}\] is a better reducing agent above 710 K.


A cuprous ore among the following is:-


Heating of MgCl2 6H2O in absence of HCl gives ______.


Carbon deposition reaction taking place in ______.


Assertion: For the extraction of iron, haematite ore is used.

Reason: Haematite is a carbonate ore of iron.


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