Match the items of Column I and Column II. 

Column I Column II
A  Lead storage battery 1. Maximum efficiency
B  Mercury cell 2. Prevented by galvanization
C  Fuel cell 3. Gives steady potential
Rusting 4. Pb is an anode, PbO2 is cathode 

Codes:

Options:  A   B   C   D 
1.  2  3  4  1
2.  1  2  3  5
3.  5  4  3  2
4.  4  3  1  2

Subtopic:  Batteries & Salt Bridge |
 88%
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Match the items of Column I and Column II.

Column I

Column II

A. κ

B. Λm

C. α

D. Q

1. I x t

2. Λm/Λm0

3. κC

4. G*R

  Codes

Options:  A   B   C   D 
1. 2 3 4 1
2. 1 2 3 5
3. 5 4 3 2
4. 4 3 2 1

Subtopic:  Conductance & Conductivity |
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Match Column-I (Types of cell) with Column-II (Characteristics shown by cells ) and mark the appropriate option:

Column I
 (Type of cell)
Column II
(Characteristics)
A Lechlanche cell  1. Cell reaction 2H2 +O2 → 2H2O
B Ni-Cd cell  2. Does not involve any ion in solution and is used in hearing aids.
C Fuel cell  3.  Rechargeable
Mercury cell  4. -Reaction at anode, Zn  → Zn2+ + 2e-

Codes:

Options:  A   B   C   D 
1.  2  3  4  1
2.  4 3 1 2
3. 1 4 3 2
4. 4 1 3 2

Subtopic:  Batteries & Salt Bridge |
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Match the items of Column I and Column II on the basis of data given below

 

Column I                     Column II
A F2 1. Metal is the strongest reducing agent
B Li 2. Metal ion which is the weakest oxidising agent
C Au3+ 3. Non-metal which is the best oxidising agent
D Br- 4. Unreactive metal
E Au 5 Anion that can be oxidised by Au3+
F Li+ 6 Anion which is the weakest reducing agent
G F- 7 Metal ion which is an oxidising agent

Options:  A   B   C   D    E   F   G 
1. 3 1 7 5 4 2 6
2. 1 2 3 5 7 4 6
3. 5  4  3  2 6 5 1
4. 4  5 2 1 6 7
 

Subtopic:  Electrochemical Series | Electrode & Electrode Potential |
 80%
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Given below are two statements: 

Assertion (A): Cu is less reactive than hydrogen.
Reason (R):  Cu2+/ Cu is negative.


 

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Electrochemical Series |
 67%
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Given below are two statements: 

Assertion (A): Ecell should have a positive value for the cell to function.
Reason (R): Ecathode < Eanode

 
 

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Relation between Emf, G, Kc & pH |
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Given below are two statements: 

Assertion (A): Conductivity of all electrolytes decreases on dilution.
Reason (R): On dilution number of ions per unit volume decreases.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Conductance & Conductivity |
 76%
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Assertion (A): Λm for weak electrolytes shows a sharp increase when the electrolytic solution is diluted.
Reason (R): For weak electrolytes degree of dissociation increases with a dilution of the solution.
  
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:   Kohlrausch Law & Cell Constant |
 80%
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Assertion (A):  Mercury cell does not give steady potential.
Reason (R):  In the cell reaction, ions are not involved in the solution.

1.  Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

 

Subtopic:  Batteries & Salt Bridge |
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Given below are two statements: 

Assertion (A): Electrolysis of NaCl solution gives chlorine at anode instead of O2 .
Reason (R): Formation of oxygen at anode requires overvoltage.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Electrolytic & Electrochemical Cell |
 69%
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