A student took a solution of copper sulphate and put a clean iron nail into it and left it for about an hour. What do we call such reactions? Why?
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Ответ:
When iron (Fe) is added is copper sulphate (CuSo4) copper gets displaced and iron sulphate (FeSO4) gets formed. The iron nail gets a deposit of brown colour Copper. These changes are chemical in nature because they are irreversible and new substances are formed.
Ответ:
the resulting compound is Li+ Cl- in a crystalline lattice structure.
so first choice is wrong as its not a double bond
third choice is wrong as its not a ball-and-stick
fourth choick is also wrong as its not a triple bond
correct ans is The chemical compound will have a network structure.