| 1 |
In the bessemerization process. |
Roasted ore is beated.
Molten matte is removed.
Molten matte is heated
Molten matte is added
|
| 2 |
Matte is a mixture of: |
FeS and CuS
Cu<sub>2</sub>O and FeO
Cu<sub>2</sub>S and FeS
CuS and FeO
|
| 3 |
Froth flotation process is used to concentrate the ore on: |
Density basis
Concentration basis
Wetting basis
Magnetic basis
|
| 4 |
Concentration is a . |
Mixing technique
Separating technique
Boiling technique
cooling technique
|
| 5 |
The residual oil is heated above 400 c to produce. |
Lubricants
Paraffin wax
Asphalt
All
|
| 6 |
Ammonical brine is prepared by dissolving ammonia gas in. |
NaCl
CaCO<sub>3</sub>
CaCl<sub>2</sub>
Na<sub>2</sub>SO<sub>4</sub>
|
| 7 |
Sodium carbonate is manufactured by. |
Haber's process
Ostwald's process
Solvay's process
All
|
| 8 |
Concentration is a separating technique in which mineral is separated from. |
Gangue
Silicates
Aluminates
All
|
| 9 |
The number of carbon atoms present in fuel oil. |
14-18
15-18
16-18
17-18
|
| 10 |
The number of carbon atoms present in diesel oil. |
10-15
11-15
12-15
13-15
|
| 11 |
The number of carbon atoms present in kerosene oil. |
8-12
9-12
10-12
11-12
|
| 12 |
The number of carbon atoms present in gasoline or petrol. |
5-10
6-10
7-10
8-10
|
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