Question

Q2) Zno +C----- Zn+CO
a) Identify the type of reaction.
b) Name the substance oxidised and reduced.
Q3) Why nitrogen is flushed in packed food stuff?
Q4) Name decomposition reaction which takes place in the presence of sunlight?
Q5) What happens when silver chloride is kept in sunlight?
Q6) A house wife does not clean her brass utensils for few days in her kitchen. She
finds a greenish coating on them. What could be the reason? What the greenish
coating is of?

Answer 1

Q2) Equation given, ZnO + C------- Zn +CO

a) The given equation is an example of displacement reaction.

b) In the given equation O(Oxygen) is reduced and C(Carbon) is oxidised.

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Q3) Nitrogen is an inert gas due to which it does not react easily. The main aim for flushing nitrogen into fod packets is to reduce the chance of racidity.

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Q4) Example for decomposition reaction in the presence of sunlight is when Silver bromide get exposed to sunlight then it decomposes into silver and bromine gas. This Equation can be written as----

AgBr(s) + Sunlight----------Ag(s) + Br(g)

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Q5) When Silver chloride is kept under the sur then it decomposes into Silver and Chlorine.

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Q6) The reason for greenish coatation over the brass utensil is that the brass utensil might have been attacked by maisture and oxygen witch it reacted and formed the greenish over it.

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I hope that this helped you.