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a
liquation
b
cupellation
c
bessemerisation
d
poling
answer is D.
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Detailed Solution
This process is used for the purification of copper and tin to remove the impurities of their oxides. Green wood → Hydrocarbons →CH4;4CuO+CH4→4Cu (pure metal)+CO2+2H2OGreen wood → Hydrocarbon →CH4;2SnO2+CH4→2Sn+CO2+2H2O