The molar conductance at infinite dilution of aluminium sulphate is 858ohm-1cm2mol-1. Given the molar ionic conductance of sulphate ions as 160ohm-1cm2mol-1 ,the molar ionic conductance of Al3+ ion is

1.  378 ohm-1cm2mol-1

2.  189 ohm-1cm2mol-1

3.  698 ohm-1cm2mol-1

4.  349 ohm-1cm2mol-1

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4
Correct Answer :

189 ohm-1cm2mol-1


Explanation :
No Explanation available for this question

When an aqueous solution of sulphuric acid is electrolysed, the ion discharged at the anode is

1.  Hydrogen

2.  Hydroxyl

3.  Sulphate

4.  Oxygen

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4
Correct Answer :

Hydroxyl


Explanation :
No Explanation available for this question

The standard electrode potentials, E0 for the half cell reactions are as Zn→Zn2++2e-,E0=0.76V,Fe→Fe2++2e-,Eo=0.41V,the EMF of the cell reaction Fe2++Zn →Zn2++ Fe is

1.  -0.35 V

2.  +0.35 V

3.  +1.17 V

4.  -1.17 V

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4
Correct Answer :

+0.35 V


Explanation :
No Explanation available for this question

In a galvanic cell, which one of the following statement is not correct

1.  Anode is negatively charged

2.  Cathode is positively charges

3.  Reduction takes place at the anode

4.  Reduction takes place at the cathode

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4
Correct Answer :

Reduction takes place at the anode


Explanation :
No Explanation available for this question

Which of the following compounds is the most easily reduced

1.  ZnO

2.  H2O

3.  Fe2O3

4.  Ag2O

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4
Correct Answer :

Ag2O


Explanation :
No Explanation available for this question

Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1M is 100Ω. The conductivity of this solution is 1.29Sm-1. Resistance of the same cell filled with 0.2M of the same solution is 520Ω. The molar conductivity of 0.02M solution of the electrolyte will be

1.  1240x10-4Sm2mol-1

2.  1.24x10-4Sm2mol-1

3.  12.4x10-4Sm2mol-1

4.  124x10-4Sm2mol-1

View Answer  
4
Correct Answer :

124x10-4Sm2mol-1


Explanation :
No Explanation available for this question

If ∧c for NH4OH is 11.5Ω-1cm2mol-1,its degree of dissociation would be (given that λoNH=73.4 and λoOH-=197.6Ω-1cm2mol-1)

1.  0.0848

2.  0.0424

3.  0.0212

4.  0.004

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4
Correct Answer :

0.0424


Explanation :
No Explanation available for this question

1.  MnO4-can be used in aqueous HCl

2.  Cr2O72- can be used in aqueous HCl

3.  MnO4-can be used in aqueous H2SO4

4.  Cr2O72-can be used in aqueous H2SO4

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4
Correct Answer :

MnO4-can be used in aqueous HCl


Explanation :
No Explanation available for this question

Strong electrolytes are those which

1.  Dissolve readily in water

2.  Conduct electricity

3.  Dissociate into ions at high dilution

4.  Completely dissociate into ions at all dilutions

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4
Correct Answer :

Dissolve readily in water


Explanation :
No Explanation available for this question

Iodin and bromine are added to a solution containing I-and Br-ions. What reaction would occur if the concentration of each species was 1M [E0(I-)=0.54V,E0(Br2,Br+)=1.08V]

1.  2Br-+I2→2Br2+2I-

2.  I2+Br2→2I-+2Br+

3.  2Br-+2I-→I2+Br2

4.  Br2+2I-→2Br-+I2

View Answer  
4
Correct Answer :

Br2+2I-→2Br-+I2


Explanation :
No Explanation available for this question
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