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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.

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प्रश्न

Explain the following:

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

दीर्घउत्तर
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उत्तर

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

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अध्याय 6: General Principle and Processes of Isolation of Elements - Multiple Choice Questions (Type - I) [पृष्ठ ८६]

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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 55.(d) | पृष्ठ ८६

संबंधित प्रश्न

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


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


In the metallurgy of aluminium ______.


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


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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

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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?


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.


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.


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

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


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