EXTRACTION OF ZINC Flashcards Preview

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Flashcards in EXTRACTION OF ZINC Deck (9)
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1

What is the ore of zinc?

Zinc blende

2

What is the compound name of zinc blende?

Zinc sulphide (ZnS)

3

What happens to ZnS at first?

It is roasted in air.

4

What is obtained after it roasted in air?

It gives Zinc oxide and Sulphur dioxide.

5

Write the chemical equation of zinc blende being roasted in air.

2 ZnS (s) + 3 O2 (g) ----> 2 ZnO (s) + 2 SO2 (g)

6

What happens to at first in the blast furnace? Include 2 chemical equations.

C (s) + O2 (g) ----> CO2 (g)
CO2 (g) + C (s) 2CO (g)

7

What happens after Zinc oxide gets reduced by carbon monoxide?

ZnO (s) + CO (g) ----> Zn (g) + CO2 (g)

8

Why isn't limestone added?

Because Zn is a gas

9

What happens to zinc vapor after it passes out of the furnace?

It is cooled and condensed.