If the concentration of $Zn ^{+2}$ and $Cu ^{+2}$ ions in Daniell cell is one unit ( 1 mole $dm ^{-3}$ ), then the value of electric potential will be :
The reaction $ \frac{1}{2} H_{2(g)}+AgCl_{(aq)} \rightleftharpoons H_{(aq)}^{+}+Cl_{(aq)}^{-}+Ag_{(s)} $ takes place in a galvanic cell. Its correct representation is :
A
$Ag / AgCl _{\text {(s) }} / KCl _{( aq )} / / AgNO _{3( aq )} / Ag _{\text {(s) }}$
B
$Pt , H _{2(g)} / HCl _{( aq )} / / AgNO _{3( aq } / Ag _{( s )}$
✓
$Pt , H _{2(g)} / HCl _{\text {(aq) }} / / AgCl _{( aq )} / Ag _{\text {(s) }}$
The standard electrode potential values of three metallic cations $X , Y , Z$ are, $0.52 V,-3.03 V$ and -1.18 V respectively. The order of reducing ability of corresponding metal is :
At $25^{\circ} C$, the standard electromotive force of $Zn +$ $Cu ^{2+} \rightarrow Cu + Zn ^{2+}$ is 1.10 , then on using $0.1 M Cu ^{2+}$ and $0.1 M Zn ^{2+}$ solution in this cell, the electromotive force of the cell will be :
For $Zn - Cu$ cell, $E ^{\circ}=1.10 V$. If the reduction potential $\left[ Cu ^{2+}{ }_{( aq )} / Cu _{( s )}\right]$ pair is 0.34 V , then the reduction potential of $\left[ Zn ^{2+}{ }_{(a q)} / Zn _{( s )}\right]$ pair will be :
Copper can be precipitated with acidic $CuSO _4$ and alkaline $Cu ( CN )_2$. If the same electric current is passed through their solution for the same time, which of the statement is true?
A
Copper deposited from $Cu ( CN )_2$ alkaline copper cyanide will be twice that of acidic $CuSO _4$.
B
The amount of copper deposited from alkaline copper cyanide will be half that of acidic $CuSO _4$.
✓
Equal amount of copper deposited from both the solutions.
D
All of the above statements are wrong.
Answer
Correct option: C.
Equal amount of copper deposited from both the solutions.