| 1 |
Chemical formula of matte will: |
Cu2S.FeS
Cu2S
Cu2O
FeS
|
| 2 |
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
|
| 3 |
When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of: |
Cu2S + Cu2O
Cu2O +FeS
Cu2S + FeS
FeO + SO2 + Cu2S
|
| 4 |
In forth flotation process the ore particles are preferentially wetted by: |
water
oil
benzene
petrole
|
| 5 |
The process of removal of gangue form the ore is technically known as: |
concentration
purification process
metallurgy
refining
|
| 6 |
Blonde hair contains compounds of: |
molybdenum
iron
titanium
copper
|
| 7 |
Chemical formula of copper glance is: |
Cu2O
Cu2S
CuFeS2
CuSO4
|
| 8 |
Chalco-pyite is an ore of: |
iron
aluminium
silver
copper
|
| 9 |
Which one of the following is manufactured by Solvar's process: |
caustic soda
washing soda
urea
sulphuric acid
|
| 10 |
Hookworm is a parasite that infects the: |
large intestine
small intestine
stomach
liver
|
| 11 |
Fertilizers are used to make up the deficiency of; |
oxygen and carbon
iron and magnesium
nitrogen and phosphorus
hydrogen and calcium
|
| 12 |
Mercury poisoning cause: |
neurological damage
high blood pressure
kidney damage
gastro
|
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