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

Explain the following: COX2 is a better reducing agent below 710 K whereas CO is a better reducing agent above 710 K.

Advertisements
Advertisements

प्रश्न

Explain the following:

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

दीर्घउत्तर
Advertisements

उत्तर

To Ellingham diagram, at temperature below 710 K,

\[\ce{ΔG^Θ_{(C, CO_2)} < ΔG^Θ_{(C, CO)}}\] hence \[\ce{CO2}\] is better reducing agent.

At temperature above 710 K, \[\ce{ΔG^Θ_{(C, CO_2)} < ΔG^Θ_{(C, CO)}}\] hence \[\ce{CO}\] is better reducing agent.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 6: General Principle and Processes of Isolation of Elements - Multiple Choice Questions (Type - I) [पृष्ठ ८६]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 6 General Principle and Processes of Isolation of Elements
Multiple Choice Questions (Type - I) | Q 55.(a) | पृष्ठ ८६

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?


Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?


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. 


How will you convert the following:
Zinc blende to Zinc metal


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


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?


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.


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?


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


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:

Generally sulphide ores are converted into oxides before reduction.


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


Carbon deposition reaction taking place in ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×