(B) When an iron rod is dipped in $CuSO_4$ solution,a displacement reaction occurs: $Fe(s) + CuSO_4(aq) \rightarrow FeSO_4(aq) + Cu(s)$.Since $Fe$ is

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Brown layer is deposited on iron rod

(B) When an iron rod is dipped in $CuSO_4$ solution,a displacement reaction occurs: $Fe(s) + CuSO_4(aq) \rightarrow FeSO_4(aq) + Cu(s)$.Since $Fe$ is more reactive than $Cu$,it displaces $Cu$ from the solution.The $Cu$ metal gets deposited on the iron rod as a brown layer.Therefore,the correct option is $B$.

Class 11 Chemistry Redox Reactions Redox reaction and Method for balancing Redox reaction

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If an iron rod is dipped in $CuSO_4$ solution,what happens?

A
Blue colour of the solution turns green
B
Brown layer is deposited on iron rod
C
No change occurs in the colour of the solution
D
Blue colour of the solution vanishes

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Redox Reactions

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Redox reaction and Method for balancing Redox reaction

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Medium

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$2 MnO_4^{-} + bI^{-} + cH_2O \rightarrow xI_2 + yMnO_2 + zOH^{-}$
If the above equation is balanced with integer coefficients,the value of $z$ is . . . . . .

DifficultJEE MAIN 2024

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Assign $A$,$B$,$C$,$D$ from the given type of reaction.
$Pb_3O_4 + 8HCl \xrightarrow{\text{Warm}} 3PbCl_2 + Cl_2 + 4H_2O$

Medium

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Phenolphthalein does not act as an indicator for the titration between

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If an iron rod is dipped in $CuSO_4$ solution,what happens?

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Assign $A, B, C, D$ from the given type of reaction for the following chemical equation:$Fe_{(s)} + 2HCl_{(aq)} \longrightarrow FeCl_{2(aq)} + H_{2(g)}$

For the redox reaction $Zn + NO_3^{-} \rightarrow Zn^{+2} + NH_4^{+}$,the coefficients of $NO_3^{-}$,$Zn$,and $H^{+}$ in the balanced equation are respectively:

$2 MnO_4^{-} + bI^{-} + cH_2O \rightarrow xI_2 + yMnO_2 + zOH^{-}$If the above equation is balanced with integer coefficients,the value of $z$ is . . . . . .

Assign $A$,$B$,$C$,$D$ from the given type of reaction.$Pb_3O_4 + 8HCl \xrightarrow{\text{Warm}} 3PbCl_2 + Cl_2 + 4H_2O$

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Assign $A, B, C, D$ from the given type of reaction for the following chemical equation:
$Fe_{(s)} + 2HCl_{(aq)} \longrightarrow FeCl_{2(aq)} + H_{2(g)}$

$2 MnO_4^{-} + bI^{-} + cH_2O \rightarrow xI_2 + yMnO_2 + zOH^{-}$
If the above equation is balanced with integer coefficients,the value of $z$ is . . . . . .

Assign $A$,$B$,$C$,$D$ from the given type of reaction.
$Pb_3O_4 + 8HCl \xrightarrow{\text{Warm}} 3PbCl_2 + Cl_2 + 4H_2O$