What do you observe when:
(i) Iodine crystals are heated in a test tube?
(ii) Iron nails are added to copper sulphate solution?
(iii) Lead nitrate crystals are heated strongly?
(iv) Ferric chloride crystals are exposed to atmosphere for some time?
(v) Blue copper sulphate crystals are heated?
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Answer:
1. disappear.
2. iron nail get rust.
3. water of crystalization are formed with NaCI
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