railway RRB JE (CBT I + CBT II) Mock Test 2024 Chemistry General Principles And Process of Isolation of Elements Metals and Its Ores

वेरी-ग्रीन प्रक्रिया में प्रयुक्त धातु आयन का नाम बताइए।

1
एल्युमीनियम 
2
पोटैशियम 
3
जिंक
4
सोडियम 
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