| 1 |
Concentration is a separating technique in which mineral is separated from. |
- A. Gangue
- B. Silicates
- C. Aluminates
- D. All
|
| 2 |
Concentration of the copper ore is carried out by: |
- A. Calcinations
- B. Roasting
- C. Forth flotation
- D. Distillation
|
| 3 |
When NaHCO<sub>3</sub> is heated it forms. |
- A. CO<sub>2</sub>
- B. Ca(OH)<sub>2</sub>
- C. CaCO<sub>3</sub>
- D. CaO
|
| 4 |
Imperial chemical industries was established in. |
- A. 1942
- B. 1944
- C. 1950
- D. 1990
|
| 5 |
Bister copper is pure about; |
- A. 70%
- B. 80%
- C. 90%
- D. 98%
|
| 6 |
Petroleum fraction having composition C<sub>7 </sub>to C<sub>10 </sub>IS called |
- A. Petroleum gas
- B. Petroleum Ether
- C. Kerosine oil
- D. Gasoline or petrol
|
| 7 |
Composition of carbon in kerosene oil is. |
- A. C<sub>10</sub>-C<sub>12</sub>
- B. C<sub>12</sub>-C<sub>12</sub>
- C. C<sub>16</sub>-C<sub>18</sub>
- D. C<sub>30</sub>-C<sub>30</sub>
|
| 8 |
the chemical formula of chalcopyrite is: |
- A. Cu<sub>2</sub>S
- B. CuFe<sub>2</sub>S
- C. CuS
- D. FeS
|
| 9 |
At the time of partition, How many industries wee present in Pakistan. |
|
| 10 |
Raw materials used in Solvay's process. |
- A. Brine
- B. Lime stone
- C. Ammonia gas
- D. All
|