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

Explain the following: Carbon and hydrogen are not used as reducing agents at high temperatures. - Chemistry

Advertisements
Advertisements

प्रश्न

Explain the following:

Carbon and hydrogen are not used as reducing agents at high temperatures.

दीर्घउत्तर
Advertisements

उत्तर

At high-temperature carbon and hydrogen reacts with metals to form metal carbides and hydrides respectively.

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 [English] Class 12
पाठ 6 General Principle and Processes of Isolation of Elements
Multiple Choice Questions (Type - I) | Q 55.(d) | पृष्ठ ८६

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?


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. 


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


In the metallurgy of aluminium ______.


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?


Explain the following:

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


Carbon deposition reaction taking place in ______.


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

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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×