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Potassium Carbonate
Lead Oxide
Ferric Oxide
Borax
Which among the given is the 2nd largest source of global energy -
Which among the given is the best source of Iodine -
Which among the given is the hardest element?
Which among the given is the petroleum wax
Which among the given is used as a lubricant in heavy machines
Which among the given is used as anesthetic -
Which among the given is used for refrigeration
Which among the given is used in dating archaeological findings
Which among the given is used in making smoke bombs
Which among the given is used in welding broken pieces of iron rails machine parts -