Which of the following is not a good coductor of electricity

1.  NaCl (molten)

2.  Silver metal

3.  NaCl (s)

4.  NaCl (aq)

View Answer  
4
Correct Answer :

NaCl (s)


Explanation :
No Explanation available for this question

The units for cell constant are

1.  cm2

2.  cm-1

3.  ohm-1cm2

4.  cm

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4
Correct Answer :

cm-1


Explanation :
No Explanation available for this question

The electrode potential of oxidation half cell

1.  Is independent of the concentration of the ions in the cell

2.  Decreases with decreased concentration of the ions in the cell

3.  Decreases with increased concentration of the ions in the cell

4.  None of the above

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4
Correct Answer :

Decreases with decreased concentration of the ions in the cell


Explanation :
No Explanation available for this question

Which of the following solutions will have the highest specific conductance

1.  0.01M NaCl

2.  0.01MCH3COOH

3.  0.01MNH4Cl

4.  0.01MK2SO4

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4
Correct Answer :

0.01MK2SO4


Explanation :
No Explanation available for this question

Which of the substance Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution

1.  Na and S

2.  Na and Hg only

3.  Pt, Hg and graphite

4.  Na, Pt and graphite

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4
Correct Answer :

Pt, Hg and graphite


Explanation :
No Explanation available for this question

The half cell reaction are; Cu2++2e-→Cu;E0=0.34V,Ag++e-→Ag;E0=0.80V.The Nernst equation for the cell at 250CCu|Cu2+(C1)||Ag+(C2)|Ag(where C1and C2 are respective concentration is

1.  E=E0-0.059/2 logC2/C1

2.  E=E0+0.059/2 logC2/C1

3.  E=E0-0.059/2 logC2/C1

4.  E=E0+0.059/2 logC2/C1

View Answer  
4
Correct Answer :

E=E0+0.059/2 logC2/C1


Explanation :
No Explanation available for this question

The cell constant is product of resistance and

1.  Conductance

2.  Specific conductance

3.  Molar conductance

4.  Speific resistance

View Answer  
4
Correct Answer :

Specific conductance


Explanation :
No Explanation available for this question

The oxidation potentials of Zn, Mg, Ni and Cu are 0.76,2.37,2.25and -0.34V respectively. Which of these will not be capable of liberating H2 from 1M HCl

1.  Zn

2.  Mg

3.  Ni

4.  Cu

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4
Correct Answer :

Cu


Explanation :
No Explanation available for this question

When a piece of copper wire is immersed in a solution of silver nitrate, the colour of solution becomes blue. This is due to the

1.  Oxidation of silver

2.  Reduction of copper

3.  Oxidation of copper

4.  Reduction of silver

View Answer  
4
Correct Answer :

Oxidation of copper


Explanation :
No Explanation available for this question

The standard electrode potential of four electrodes I, II, III and IV are -2.65, -1.72, - 0.80 and 0.72 respectively. The highest chemical activity will be exhibited by

1.  I

2.  I I

3.  I I I

4.  IV

View Answer  
4
Correct Answer :

I


Explanation :
No Explanation available for this question
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