1.

In the extraction of aluminium metal , one of the process is summarised as follows : Which of the following entrie correctly summarises reagents , electrodes & products of the process ?

Answer»

`{:( I , II , III , IV , V) , ((a) NaOH , [Al(OH)_(4)] , HF , Na_(3)AlF_(6) , "Cathode"):}`
`{:(, I , II , III , IV , V) , ((B), NaOH , NaAlO_(2) , CO_(2) , CO_(2) , "Anode"):}`
`{:(, I , II , III , IV , V) , ((c), H_(2)SO_(4) , Al_(2)(SO_(4))_(3) ,NH_(3) , Na_(3)AlF_(6) , "Cathode"):}`
`{:(, I , II , III , IV , V) , ((d), NaOH , NaAlO_(2) ,CO_(2), Na_(3)AlF_(6) , "Cathode"):}`

Answer :a,b,d


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