Van Arkel method is used for refining

1.  Lead

2.  Zirconium

3.  Vanadium

4.  Zinc

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4
Correct Answer :

Zirconium


Explanation :
No Explanation available for this question

Iron is extracted from magnetite by reduction with

1.  C

2.  Mg

3.  Al

4.  H2

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4
Correct Answer :

C


Explanation :
No Explanation available for this question

The metal always found in free state is

1.  Gold

2.  Silver

3.  Copper

4.  Sodium

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4
Correct Answer :

Gold


Explanation :
No Explanation available for this question

The oil used in the froth floatation method for the purification of ores is

1.  Coconut oil

2.  Kerosene Oil

3.  Mustard Oil

4.  Pine Oil

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4
Correct Answer :

Pine Oil


Explanation :
No Explanation available for this question

Magnesium is not present in

1.  Cryolite

2.  Dolomite

3.  Carnallite

4.  Epsom salt

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4
Correct Answer :

Cryolite


Explanation :
No Explanation available for this question

Which of the following is a carbonate are

1.  Pyrolusite

2.  Malachite

3.  Diaspore

4.  Cassiterite

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4
Correct Answer :

Malachite


Explanation :
No Explanation available for this question

Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching

1.  Galena

2.  Copper pyrite

3.  Sphalerite

4.  Argentite

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4
Correct Answer :

Argentite


Explanation :
No Explanation available for this question

Process of heating an ore in air to remove sulphur is

1.  Calcination

2.  Roasting

3.  Roasting

4.  None of these

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4
Correct Answer :

Roasting


Explanation :
No Explanation available for this question

Which is not an ore of lead

1.  Cerussite

2.  Anglesite

3.  Cassiterite

4.  Galena

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4
Correct Answer :

Cassiterite


Explanation :
No Explanation available for this question

Which of the following is not a mineral iron

1.  Magnetite

2.  Siderite

3.  Smithsonite

4.  Lumonite

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4
Correct Answer :

Smithsonite


Explanation :
No Explanation available for this question
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