How many of following are correctly matched for electrolytic reduction in molten state. OreReagent / ProcessRemark(a) Al2O3AlF3 and CaF2 addedDecrease M.P.(b) MgCl2KCl, CaCl2Increase conductivity(c) NaClAlCl3Decrease M.P.(d) AlF3Haroult processAl form at anode(e)MgBr2Dow processBr2 form at anode(f)Al2O3conc. NaOHLeaching process(g)CarnalliteDow processDirectly applied to carnallite crystals.

How many of following are correctly matched for electrolyti…

Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) General Numeric Response

Published on: August 13, 2026

How many of following are correctly matched for electrolytic reduction in molten state.

	Ore	Reagent / Process	Remark
(a)	Al2O3	AlF3 and CaF2 added	Decrease M.P.
(b)	MgCl2	KCl, CaCl2	Increase conductivity
(c)	NaCl	AlCl3	Decrease M.P.
(d)	AlF3	Haroult process	Al form at anode
(e)	MgBr2	Dow process	Br2 form at anode
(f)	Al2O3	conc. NaOH	Leaching process
(g)	Carnallite	Dow process	Directly applied to carnallite crystals.

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The correct answer is:

4 (a, b, e, f)

Sol. In NaCl metallurgy CaCl 2 and KF are added. Carnellite firstly converted into anhydrous MgCl 2 then undergo process.

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