At infinite dilution, the aqueous solution of BaCl2,molar conductivity of Ba2+and CI-ions are =127.32Scm2/mol and 76.34Scm2//mol respectively. What is ∧∞m for BaCl2 at same dilution

1.  280Scm2mol-1

2.  330.98 Scm2mol-1

3.  90.98 Scm2mol-1

4.  203.6 Scm2mol-1

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4
Correct Answer :

280Scm2mol-1


Explanation :
No Explanation available for this question

Standard zinc electrode is coupled with another standard electrode to form a cell whose e.m.f. was found to be 1.60 volts, reduction taking place at zinc electrode. If the standard reduction potential of the zinc electrode is -0.76 V, standard reduction potential of the other electrode is

1.  -2.36 V

2.  0.84 V

3.  2.36 V

4.  0.84 V

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4
Correct Answer :

-2.36 V


Explanation :
No Explanation available for this question

How much current is required to deposit 0.195g of elemental Pt from a solution containing [PtCl6]2-ion with a time period of 2 hrs (Atomic mass of Pt =195)

1.  0.054 A

2.  0.214 A

3.  0.428 A

4.  0.027 A

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4
Correct Answer :

0.054 A


Explanation :
No Explanation available for this question

Zinc - copper couple that can be used as a reducing agent is obtained by

1.  Mixing zinc dust and copper gauze

2.  Zinc coated with copper

3.  Copper coated with zinc

4.  Zinc and copper wires welded together

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4
Correct Answer :

Zinc coated with copper


Explanation :
No Explanation available for this question

An example of a simple fuel cell is

1.  Lead storage battery

2.  Daniell cell

3.  Leclanche cell

4.  H2-O2 cell

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4
Correct Answer :

H2-O2 cell


Explanation :
No Explanation available for this question

For the cell reaction,Co+Ni2+↔CO2+Ni:Eo=0.046V.The e.m.f. of cell, when[CO2+]=0.1M and [Ni2+]=10M is

1.  0.048V

2.  0.056V

3.  0.076V

4.  0.016V

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4
Correct Answer :

0.076V


Explanation :
No Explanation available for this question

The electrode potentials of some half cell reactions are Cl2+2e-→2Cl-(aq) ;E0=+1.36V,O2+2H+(aq) +2e-→H2O2(aq);E0=+0.65V,F2+2e-→2F-(aq);E0=+2.87V,2H2O+2e-→H2(g)+2OH-(aq);E0=-0.83V The strongest oxidising agent is

1.  Cl2

2.  O2

3.  F2

4.  H2O

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4
Correct Answer :

F2


Explanation :
No Explanation available for this question

Which of the following is not anodic reaction in an electrochemical series

1.  Cl-→Cl+e-

2.  Cu→Cu2++2e-

3.  H++e-→ H

4.  Ag-e-→Ag+

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4
Correct Answer :

H++e-→ H


Explanation :
No Explanation available for this question

The reference calomel electrode is made from

1.  CuSO4

2.  HgCl2

3.  Hg2Cl2

4.  Pt

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4
Correct Answer :

Hg2Cl2


Explanation :
No Explanation available for this question

A depolarizer used in dry cell is

1.  Ammonium chloride

2.  Sodium carbonate

3.  Manganese dioxide

4.  Lead sulphate

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4
Correct Answer :

Manganese dioxide


Explanation :
No Explanation available for this question
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