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Galena is an ore of...

Galena is an ore of

A

Pb

B

Hg

C

Sn

D

Zn

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The correct Answer is:
A
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Galena (an ore) is partially oxidized by passing air through it at high temperature. After some time, the passage of air is stopped, but the heating is continued in a closed furnace such that the contents undergo self-reduction. The weight (in kg) of Pb produced per kg of O_(2) consumed is ____. (Atomic weights in g mol^(1) : O = 16, S = 32, Pb = 207)

Galena (an ore) is partially oxidised by passing air through it at high temperature. After some time the passage of air stopped, but the heating is continued in a closed furnace such that the contents undergo self-reduction. The weight (in kg) of Pb produced per kg of O_(2) consumed is_ , "Atomic weights in g mol"^(-1): O =16,S=32,Pb=207

Galena is reported to have 23.8% PbS . Calculate the volume of oxygen required at STP to roast 10 kg galena to PbO and SO_(2) .

Every mineral is an ore, but every ore is not a mineral.

TARGET PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Critical Thinking
  1. Which of the following reactions does NOT occur in blast furnace ?

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  2. Which of the following is NOT a mineral of aluminium ?

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  3. Baeyer's process is used for the purification of bauxite containing as...

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  4. The chief impurity present in bauxite is

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  5. Which of the following reaction is involved in the Hall's method of pu...

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  6. Alumina is .

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  7. Aluminium is produced on a large scale by electrolysis of alumina, dis...

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  8. In hall and Heroult's process , the molten electrolyte is covered with...

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  9. Aluminothermic process is used for the extraction of metals, whose oxi...

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  10. High quantity of heat is produced in the formation of Al(2)O(3). This ...

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  11. For the extraction of chromium from Cr(2)O(3) the process adopted is ...

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  12. The reaction which shows as autoreduction is .

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  13. Blister copper is .

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  14. During electrolytic refining of blister copper, .

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  15. Cu^(2+) ions are more stable than Cu^(+) ions because Cu^(2+) ions as ...

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  16. Which of the following is NOT an ore ?

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  17. Galena is an ore of

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  18. Which of the following is FALSE ?

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  19. Which of the following ores is subjected to roasting during metallurgi...

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  20. Blast furnace is employed in the smelting of oxide ore with coke and f...

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