| 1 |
Sodium carbonate is manufactured by. |
- A. Haber's process
- B. Ostwald's process
- C. Solvay's process
- D. All
|
| 2 |
Concentration is a separating technique in which mineral is separated from. |
- A. Gangue
- B. Silicates
- C. Aluminates
- D. All
|
| 3 |
The number of carbon atoms present in kerosene oil. |
- A. 8-12
- B. 9-12
- C. 10-12
- D. 11-12
|
| 4 |
The number of carbon atoms present in petroleum ether. |
- A. 1-5
- B. 2-5
- C. 3-7
- D. 5-7
|
| 5 |
Chalco-Pyrite is an ore of: |
- A. Copper
- B. Silver
- C. Iron
- D. Aluminium
|
| 6 |
In solvay's process slaked lime is used to: |
- A. Prepare CO<sub>2</sub>
- B. Prepare quick lime
- C. Recover ammonia
- D. Form Na<sub>2</sub>CO<sub>3</sub>
|
| 7 |
How many percentage blister copper is pure? |
- A. 95%
- B. 75%
- C. 98%
- D. 100%
|
| 8 |
Blast furnace usually used for the metallurgy of. |
- A. Iron
- B. Copper
- C. Aluminum
- D. Both a and b
|
| 9 |
Sindh alkalies limited was established near Karachi in. |
- A. 1965
- B. 1966
- C. 1970
- D. 2000
|
| 10 |
Blonde hair contains compound of. |
- A. Iron
- B. Copper
- C. titanium
- D. Molybdenum
|
