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chemistry > metallurgy > Flashcards

metallurgy Flashcards

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1
Q

example of collectors

A
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2
Q

example for froth stabilisers

A
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3
Q

explain how NaCN acts as depresseant

A

used to separate zns and pbs

does not allow zns to come to top …only pbs comes to top

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4
Q

what does al2o3 react with in the first step of leaching

A

conc naoh

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4
Q

What is formed when al2o3 reacts with naoh

A

na{al(oh)}4

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5
Q

reagents used to leach gold and silver

A

Cyanide ,then Zn

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6
Q

what does copper matte contain

A

cu2S fes

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7
Q

what is the slag produced while extracting copper

A

fesio3

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8
Q

what is the slag produced while extracting copper

A

fesio3

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9
Q

What happens to fe2o3 in the upper part of blasting furnace

A

fe2o3 converts to fe3o4 and to feo

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10
Q

what reactions takes place in the lower part of blasting furnace

A

c +co2——co

feo+co——-fe +co2

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10
Q

what reactions takes place in the lower part of blasting furnace

A

c +co2——co

feo+co——-fe +co2

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11
Q

what type of iron has 4 percent carbon

A

pig iron

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12
Q

what is the purest form of iron

A

wrought iron

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13
Q

what does fe2o3 react with to form wrought iron

A

c
thats it
fe2o3+c —–fe +co

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14
Q

hall heroult process is used to obtain

A

aluminium

15
Q

in hall heroult process ,what is al2o3 mixed with before reaction

A

CaF2 or Na3AlF6

16
Q

name the impurities (atleast 3 ) separated during electrolytic refining

A

Ag Au Pt Sb Se Te

17
Q

what metal is monds process for and what metal does it react with
what happens

A

monds process is for ni
impure ni reacts with CO to give NiCO4
This NiCO4 then decomposes to give pure nickel

18
Q

Zone refining used to purify which materials mainly

A
19
Q

malachite is ore of ?

A

copper

20
Q

give formula of copper glance

A

cu2S

21
Q

Zinc blende formula

A

ZnS

22
Q

Calamine formula

A

ZnCO3

23
Q

Zincite formula

A

Zno

chemistry (8 decks)

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