The device known as prolong is used in the extraction of following metal

1.  Zn

2.  Ag

3.  Cu

4.  Fe

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4
Correct Answer :

Zn


Explanation :
No Explanation available for this question

The difference in ΔH and ΔE for the combustion of methane at 270C would be

1.  -1800 Cal

2.  -162 Cal

3.  -1200 Cal

4.  0

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4
Correct Answer :

-1200 Cal


Explanation :
No Explanation available for this question

Belgian process is used for the extraction of

1.  Cu

2.  Ag

3.  Zn

4.  Fe

View Answer  
4
Correct Answer :

Zn


Explanation :
No Explanation available for this question

A solution of Na2SO4 in water is electrolysed using inert electrodes.The products at cathode and anode are respectively

1.  H2,O2

2.  O2,H2

3.  O2,Na

4.  O2,SO2

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4
Correct Answer :

H2,O2


Explanation :
No Explanation available for this question

In the extraction of copper,the slag formed in the blast furnace

1.  CaSiO3

2.  FeSiO3

3.  Ca3(PO4)2

4.  MnSiO3

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4
Correct Answer :

FeSiO3


Explanation :
No Explanation available for this question

If ∧ c of NH4OH is 11.5Ω-1cm2mol-1,its degree of dissociation would be

1.  0.157

2.  0.058

3.  0.0424

4.  0.0848

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4
Correct Answer :

0.0424


Explanation :
No Explanation available for this question

The molar conductance of acetic acid at infinite dilution is λ∞.If the specific conductivity of 0.1M acetic acid is S,the apparent degree of ionization is:

1.  10000S/λ∞

2.  10S/λ∞

3.  λ∞/100S

4.  100000S/λ∞S

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4
Correct Answer :

10000S/λ∞


Explanation :
No Explanation available for this question

Which of the following metal cannot occur in native state

1.  Cu

2.  Zn

3.  Ag

4.  Fe

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4
Correct Answer :

Zn


Explanation :
No Explanation available for this question

Three faradays of electricity are passed through molten Al2O3,aqueous solution of CuSO4 and molten NaCl taken in three different electrolytic cells.The amount of Al,Cu and Na deposited at cathodes

1.  1 mole:2 mole:3 mole

2.  1 mole:1.5 mole:3 mole

3.  3 mole:2 mole:1 mole

4.  1 mole:1.5 mole:2 mole

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4
Correct Answer :

1 mole:1.5 mole:3 mole


Explanation :
No Explanation available for this question

The Cu2O impurity present in copper is removed by

1.  Liquation

2.  Distillation

3.  Poling

4.  Zone refining

View Answer  
4
Correct Answer :

Poling


Explanation :
No Explanation available for this question
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