Malachite is an ore of

1.  Mercury

2.  Gold

3.  Platinum

4.  Copper

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4
Correct Answer :

Copper


Explanation :
No Explanation available for this question

The main ore of iron is its

1.  Sulphate

2.  Chloride

3.  Oxide

4.  Nitrate

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4
Correct Answer :

Oxide


Explanation :
No Explanation available for this question

Silica is added to roasted copper ore during smelting in order to remove

1.  Cuprous oxide

2.  Cuprous sulphide

3.  Ferrous sulphide

4.  Ferrous oxide

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4
Correct Answer :

Ferrous oxide


Explanation :
No Explanation available for this question

Zone refining has been employed for preparing ultra pure samples of

1.  Cu

2.  Na

3.  Ge

4.  Zn

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4
Correct Answer :

Ge


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 impurities associated with minerals are called

1.  Slag

2.  Flux

3.  Gangue

4.  Ore

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4
Correct Answer :

Gangue


Explanation :
No Explanation available for this question

Which of the following metals does not occur as oxide

1.  Iron

2.  Aluminium

3.  Sodium

4.  Copper

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4
Correct Answer :

Sodium


Explanation :
No Explanation available for this question

The Compound X is

1.  CH3CH2NH2

2.  C2H6

3.  CH3CONH2

4.  (CH3)2NH

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4
Correct Answer :

CH3CH2NH2


Explanation :
No Explanation available for this question

Treatment of nitrobenzene with tin and hydrochloric acid gives

1.  Aniline

2.  Nitrosobenzene

3.  Benzen

4.  Diazonium salt

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4
Correct Answer :

Aniline


Explanation :
No Explanation available for this question

Which of the following will give a primary amine on hydrolysis

1.  Oxime

2.  Alkyl cyanide

3.  Alkyl isocyanide

4.  Nitroparaffin

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4
Correct Answer :

Alkyl cyanide


Explanation :
No Explanation available for this question
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