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Electrochemistry Chemistry - Electrochemistry

CBSE - STD 12 Science - Chemistry (CBSE - English Medium). 113 questions in this chapter.

Question types

Electrochemistry question types

113 questions across 6 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

113
Questions
6
Question groups
5
Question types
Sample Questions

Electrochemistry questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 2M.C.Q (1 Marks)1 Mark
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 :
  • A
    0.00 V
  • ✓
    1.10 V
  • C
    1.35 V
  • D
    2.00 V

Answer: B.

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Q 3M.C.Q (1 Marks)1 Mark
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
    $Pt , H _{2(g)} / HCl _{( aq )} / / AgNO _{3( aq } / Ag _{( s )}$
  • ✓
    $Pt , H _{2(g)} / HCl _{\text {(aq) }} / / AgCl _{( aq )} / Ag _{\text {(s) }}$
  • D
    $Pt , H _{2(g} / KCl _{\text {(qq })} / / AgCl _{\text {(s) }} / Ag$

Answer: C.

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Q 4M.C.Q (1 Marks)1 Mark
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 :
  • ✓
    Y $>$ Z $>$ X
  • B
    $X >$ Y $>$ Z
  • C
    $Z>Y>X$
  • D
    $Z>X>Y$

Answer: A.

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Q 5M.C.Q (1 Marks)1 Mark
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 :
  • ✓
    1.10 V
  • B
    +0.110 V
  • C
    -1.10 V
  • D
    -0.11 V

Answer: A.

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Q 71 Marks Question1 Mark
Which of the following will have higher molar conductivity between them : (i) One mole NaCl in 100 ml solution (ii) One mole NaCl in 250 ml solution and why?
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Q 163 Marks Question3 Marks
In which of the following pairs will more electric current flow and why?
(a) KCl solution $25^{\circ} C$ and KCl solution at $50^{\circ} C$.
(b) $0.2 \quad M \quad CH _3 COOH$ solution and 2 M $CH _3 COOH$ solution.
(c) $NH _4 OH$ solution at $25^{\circ} C$ and at wire at $50^{\circ} C$.
(d) Al wire at $25^{\circ} C$ and Al wire at $50^{\circ} C$.
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