1.  2H2O2→O2+4H++4e-

2.  3F-→3F+3e-

3.  Al+3+3e-→Al

4.  2H++2e+→H2

4
Correct Answer :

Al+3+3e-→Al


Explanation :
No Explanation available for this question

1.  Wrought iron

2.  Mild iron

3.  Hard steel

4.  Cast iron

4
Correct Answer :

Cast iron


Explanation :
No Explanation available for this question

1.  Zone refining method

2.  Electro refining

3.  Liquation

4.  Poling

4
Correct Answer :

Electro refining


Explanation :
No Explanation available for this question

1.  Ag

2.  Fe

3.  Zn

4.  Sn

4
Correct Answer :

Ag


Explanation :
No Explanation available for this question

1.  Cu

2.  Al

3.  Mg

4.  Na

4
Correct Answer :

Cu


Explanation :
No Explanation available for this question

1.  CO2+C→2CO

2.  Fe2O3+3CO→2Fe

3.  C+O2→CO2

4.  FeO+SiO2→FeSiO3

4
Correct Answer :

CO2+C→2CO


Explanation :
No Explanation available for this question

1.  Smelting

2.  Calcinations

3.  Roasting

4.  Liquation

4
Correct Answer :

Smelting


Explanation :
No Explanation available for this question

1.  Liquation

2.  Amalgamation

3.  Leaching

4.  Calcination

4
Correct Answer :

Leaching


Explanation :
No Explanation available for this question

1.  Flux

2.  Slag

3.  Gangue

4.  Refractory material

4
Correct Answer :

Gangue


Explanation :
No Explanation available for this question

1.  Cu2S+little FeS

2.  Cu2S+little Fe

3.  Cu2O+little FeS

4.  Cu2O+little FeO

4
Correct Answer :

Cu2S+little FeS


Explanation :
No Explanation available for this question

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