The electrode potential of hydrogen electrode at 298 K is assumed to be

1.  1

2.  0

3.  10

4.  100

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4
Correct Answer :

0


Explanation :
No Explanation available for this question

Which of the following solutions will turn blue on adding a piece of copper metal to it

1.  MgCl2(aq)

2.  ZnSO4(aq)

3.  AgNO3(aq)

4.  KNO3(aq)

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4
Correct Answer :

AgNO3(aq)


Explanation :
No Explanation available for this question

The e.m.f. of a cell represented by the equation: Mg(s)+2Ag+(0.0001M)→Mg2+(0.130M)+2Ag(s) having E0=3.17 V is

1.  2.96 V

2.  3.38 V

3.  2.75 V

4.  2.54 V

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4
Correct Answer :

2.96 V


Explanation :
No Explanation available for this question

Two electrolytic cells, one containing acidified ferrous sulphate and other containing acidified ferric sulphate are connected in series. The ratio of iron deposited at cathodes in the two cells will be respectively

1.  2:1

2.  2:3

3.  1:1

4.  3:2

View Answer  
4
Correct Answer :

3:2


Explanation :
No Explanation available for this question

In the concentration cell, the electrical energy is due to

1.  Oxidation of fuel

2.  Transferenc of substance from one substance to another

3.  Decomposition reaction

4.  Electrolysis of the substance

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4
Correct Answer :

Transferenc of substance from one substance to another


Explanation :
No Explanation available for this question

The limiting molar conductivities 0 for NaCl, KBr and KCl are 126,152and 150Scm2mol-1 respectively. The ?0 for NaBr is

1.  278 Scm2 mol-1

2.  976 Scm2 mol-1

3.  128 Scm2 mol-1

4.  302 Scm2 mol-1

View Answer  
4
Correct Answer :

128 Scm2 mol-1


Explanation :
No Explanation available for this question

Which of the following plots represents correctly the variation of equivalent conductance with dilution for a strong electrolyte

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

A half reaction in an electrochemical cell is one that

1.  Occurs at one electrode

2.  Goes only half way to completion

3.  Involves half moles of the concentration of the solution

4.  Always oxidizes

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4
Correct Answer :

Occurs at one electrode


Explanation :
No Explanation available for this question

How many coulombs of electricity are comsumed when a 100mA current is passed through a solution of AgNO3 for half an hour during an electrolysis experiment

1.  108

2.  18000

3.  180

4.  3000

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4
Correct Answer :

180


Explanation :
No Explanation available for this question

The theory of ionization of electrolytes was proposed by

1.  Lewis

2.  Arrhenius

3.  Ostwald

4.  Debye and Huckel

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4
Correct Answer :

Arrhenius


Explanation :
No Explanation available for this question
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