When Zn metal is added to CuSO4 solution Cu is precipitated.It is due to

1.  Oxidation of Cu2+

2.  Reduction of Cu2+

3.  Hydrolysis of CuSO4

4.  Ionization of CuSO4

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4
Correct Answer :

Reduction of Cu2+


Explanation :
No Explanation available for this question

Copper matte is a molten mixture of

1.  Cu2S+little FeS

2.  Cu2S+little FeO

3.  Cu2O+little FeO

4.  Cu2O+little FeS

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4
Correct Answer :

Cu2S+little FeS


Explanation :
No Explanation available for this question

What is the reduction electrode potential(in volts)of copper electrode when [Cu2+]=0.01M in a solution at 250C(E0 of Cu2+/Cu electrode is +0.34V)

1.  0.3991

2.  0.2809

3.  0.3105

4.  0.3695

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4
Correct Answer :

0.2809


Explanation :
No Explanation available for this question

Reaction that takes place at zinc anode in dry cell is

1.  Zn2++2e-→Zn(s)

2.  Zn(s)→Zn2++2e-

3.  Mn2++2e-→Mn(s)

4.  Mn(s)→Mn++e-+1.5V

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4
Correct Answer :

Zn(s)→Zn2++2e-


Explanation :
No Explanation available for this question

In dry cell cathode is

1.  Zn

2.  C

3.  Zn+NH4Cl

4.  C+MnO2

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4
Correct Answer :

C


Explanation :
No Explanation available for this question

Liquation method is used to refine following crude metal

1.  Silver

2.  Lead

3.  Mercury

4.  Copper

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4
Correct Answer :

Lead


Explanation :
No Explanation available for this question

Lead accumulator is

1.  Acid storage cell

2.  Alkali storage cell

3.  Both

4.  Cant be predicted

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4
Correct Answer :

Acid storage cell


Explanation :
No Explanation available for this question

The copper metal is mainly extracted from its

1.  Carbonate ore

2.  Sulphide ore

3.  Sulphate ore

4.  Chloride ore

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4
Correct Answer :

Sulphide ore


Explanation :
No Explanation available for this question

Ferromagnetism is in

1.  ↑ ↑↑↑↑

2.  ↑↓↑↓

3.  ↑↑↑↓↓

4.  ↑↑↓↓↑↑↑↓↓↓

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4
Correct Answer :

↑ ↑↑↑↑


Explanation :
No Explanation available for this question

Formula of ruby copper or cuprite is

1.  Cu2O

2.  Cu2S

3.  CuCO3Cu(OH)2

4.  CuFeS2

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4
Correct Answer :

Cu2O


Explanation :
No Explanation available for this question
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