Bromine is obtained on commercial scale from
Caliche
Carnellite
Common salt
Cryolite
Carnellite is KClMgCl2.6H2O.
The mother liquor life after crystallisation of KCl from carnellite contain about 0.25% of bromine as MgBr2andKBr.
From the given set of minerals, the number of ores of copper is/are ___ Chalcocite, pyrargyrite, cuprite, carnallite, covellite, sphalerite, azurite, malachite, cryolite