The two metals which can be extracted just by heating their sulphides in air are:
(b) copper and aluminium
(a) sodium and copper
(d) mercury and copper
(c) potassium and zinc.
Answer-
ᴅ) ᴍᴇʀᴄᴜʀy ᴀɴᴅ ᴄᴏᴩᴩᴇʀ.
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D
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