Given are two statements one is labeled as Assertion A and other is labeled as Reason R.
Assertion A : Magnesium can reduce Al2O3 at a temperature below 1350°C, while above 1350°C aluminium can reduce MgO
Reason R : The melting and boiling points of magnesium are lower thatn those of aluminium.
In light of the above statements, choose most appropriate answer for the options given below:
Given are two statements one is labeled as Assertion A and other is labeled as Reason R.
Assertion A : Magnesium can reduce Al2O3 at a temperature below 1350°C, while above 1350°C aluminium can reduce MgO
Reason R : The melting and boiling points of magnesium are lower thatn those of aluminium.
In light of the above statements, choose most appropriate answer for the options given below:
Below 1350° C, Mg can reduce Al2O3 and above 1350°C, Al can reduce MgO (from Ellingham diagram).
Melting and boiling point of Mg are lower than that of Al.
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In the metallurgy of aluminium, purified Al2O3 is mixed with Na3AIF6 or CaF2 which lowers the melting point of the mixture and brings conductivity.
Ellingham diagram explains the feasibility of reduction process not the kinetics of process.
Malachite : CuCO3.Cu (OH)2
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Copper pyrite : Cu2S.Fe2S3.
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Chemistry Ncert Solutions Class 12th 2023
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