Give reason why:
$(i)$ White coloured silver chloride turns grey when kept in sunlight.
$(i)$ White coloured silver chloride turns grey when kept in sunlight.
(N/A) When white silver chloride $(AgCl)$ is exposed to sunlight,it undergoes a photochemical decomposition reaction.
In this process,silver chloride decomposes into metallic silver $(Ag)$ and chlorine gas $(Cl_2)$.
The chemical equation for this reaction is: $2AgCl(s) \xrightarrow{\text{sunlight}} 2Ag(s) + Cl_2(g)$.
The grey colour is due to the formation of metallic silver,which is grey in appearance.
In this process,silver chloride decomposes into metallic silver $(Ag)$ and chlorine gas $(Cl_2)$.
The chemical equation for this reaction is: $2AgCl(s) \xrightarrow{\text{sunlight}} 2Ag(s) + Cl_2(g)$.
The grey colour is due to the formation of metallic silver,which is grey in appearance.
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Which of the following statements about the given reaction are correct?
$3 Fe (s) + 4 H_2 O (g) \rightarrow Fe_3 O_4 (s) + 4 H_2 (g)$
$(i)$ Iron metal is getting oxidised
$(ii)$ Water is getting reduced
$(iii)$ Water is acting as reducing agent
$(iv)$ Water is acting as oxidising agent
$3 Fe (s) + 4 H_2 O (g) \rightarrow Fe_3 O_4 (s) + 4 H_2 (g)$
$(i)$ Iron metal is getting oxidised
$(ii)$ Water is getting reduced
$(iii)$ Water is acting as reducing agent
$(iv)$ Water is acting as oxidising agent
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$(i)$ State the colour of ferrous sulphate crystals both before heating and after heating.
$(ii)$ Name the gases produced during heating.
$(iii)$ Write the chemical equation for the reaction.
$(i)$ State the colour of ferrous sulphate crystals both before heating and after heating.
$(ii)$ Name the gases produced during heating.
$(iii)$ Write the chemical equation for the reaction.
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$(iii)$ What type of reaction is this?
$(iv)$ Why should we use salt water?
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$(b)$ $Fe(s) + ZnSO_4(aq) \rightarrow FeSO_4(aq) + Zn(s)$
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