मराठी
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
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 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
पाठ 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’?


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


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


The impurity that is added externally to remove the impurity already present in the ore is known as ____________.


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 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


How is copper extracted from low grade copper ores?


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.


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:

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


A cuprous ore among the following is:-


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


\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]

The number of CN ions involved in the balanced equation is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×