| 1 |
In smelting process a small amount of coke is required because: |
it is highly endothermic process
it is highly exothermic process
it is very fast process
it is very slow process
|
| 2 |
When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of: |
Cu2S + Cu2O
Cu2O +FeS
Cu2S + FeS
FeO + SO2 + Cu2S
|
| 3 |
In forth flotation process the ore particles are preferentially wetted by: |
water
oil
benzene
petrole
|
| 4 |
The process of removal of gangue form the ore is technically known as: |
concentration
purification process
metallurgy
refining
|
| 5 |
Blonde hair contains compounds of: |
molybdenum
iron
titanium
copper
|
| 6 |
Chemical formula of copper glance is: |
Cu2O
Cu2S
CuFeS2
CuSO4
|
| 7 |
Chalco-pyite is an ore of: |
iron
aluminium
silver
copper
|
| 8 |
Which one of the following is manufactured by Solvar's process: |
caustic soda
washing soda
urea
sulphuric acid
|
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