Answer:
(a)
On calcination zinc carbonate decomposes to form its oxide.
(1)
(b) On roasting zinc sulphide changes to its oxide.
(1)
(c) Zinc oxide is reduced in zinc.
(1)
(d) Cinnabar (HgS) is heated in air to form metal mercury.
(1)
(e) Manganese dioxide on heating with aluminium powder
will form manganese metal.
Heat (1)
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