Which one of the following will increase the voltage of the cell Sn(s)+2Ag+(aq) →Sn2+(aq) +2Ag(s)

1.  Increase in size of the silver rod

2.  Increase in the concentration of Sn2+ ions

3.  Increase in the concentration of Ag+ ions

4.  None of the above

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4
Correct Answer :

Increase in the concentration of Ag+ ions


Explanation :
No Explanation available for this question

The total number of electrons involved in the reaction when one Faraday of electricity is passed through an electrolytic solution is

1.  96500

2.  6.02x1023

3.  22400

4.  1

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4
Correct Answer :

6.02x1023


Explanation :
No Explanation available for this question

The amount of electricity required to deposit 0.9g of aluminium when the electrode reaction is: Al3++3e-→Al(atomic mass of Al =27)

1.  9.65x103C

2.  1.93x104C

3.  9.65x104C

4.  4.34x105C

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4
Correct Answer :

9.65x103C


Explanation :
No Explanation available for this question

A galvanic cell is set up from a zinc bar weighing 100g and 1.0L of 1.0 M CuSO4 solution. How long would the cell run assuming it delivers a steady current of 1.0 amp

1.  24.6 hr

2.  26.8 hr

3.  53.6 hr

4.  16.8 hr

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4
Correct Answer :

53.6 hr


Explanation :
No Explanation available for this question

The coulombs of electricity required for reduction of 1 mol of MnO-4 to Mn2+ are

1.  96500 C

2.  1.93 x 105C

3.  4.83 x 105C

4.  9.65 x 105C

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4
Correct Answer :

4.83 x 105C


Explanation :
No Explanation available for this question

The standard e.m.f. of a cell involving one electron change is found to be 0.591Vat 250C. The equilibrium constant of the reaction is (F=96500Cmol-1;R=8.314JK-1mol-1)

1.  x 1010

2.  x 105

3.  x 101

4.  x 1030

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4
Correct Answer :

x 1010


Explanation :
No Explanation available for this question

How is cell potential (E0 Cell) related to equilibrium constant (Kc) for a cell reaction

1.  E0Cell=(2.303RT/nF) (log1/Kc)

2.  E0Cell=nRTlogKc

3.  E0Cell=- log1/Kc=(2.303RT/nF)

4.  d.E0Cell= (2.303RT/nF) logKc

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4
Correct Answer :

d.E0Cell= (2.303RT/nF) logKc


Explanation :
No Explanation available for this question

In H2-O2 fuel cell, the reaction occurring at cathode is

1.  

2.  H++e-→1/2H2

3.  O2+2H2O+4e-→4OH-

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

Which of the following shows the correct variation of ∧m vs √C for acetic acid

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

Four alkali metals A, B, C and D are having respectively standard reduction potential as -3.05, -1.66, -0.40 and 0.08 V. Which one will be the most reducing

1.  A

2.  B

3.  C

4.  D

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4
Correct Answer :

A


Explanation :
No Explanation available for this question
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