| 1 |
Metallurgy involves which of the following steps? |
- A. Mining and enrichment
- B. Reduction
- C. Refining and casting.
- D. All of these
|
| 2 |
Red hair contains compound of. |
- A. Iron
- B. copper
- C. titanium
- D. Molybdenum
|
| 3 |
Process of heating the concentrated ore to high temperature in excess of air is called. |
- A. Roasting
- B. Smelting
- C. Bessemerization
- D. All
|
| 4 |
Ammonia is prepared by: |
- A. Solvay's process
- B. Haber's process
- C. Floatation process
- D. Bayer's process
|
| 5 |
Urea is nitrogenous fertilizer. It consist of nitrogen. |
- A. 26.6 %
- B. 36.6%
- C. 46.6%
- D. 56.6%
|
| 6 |
Blonde hair contains compound of. |
- A. Iron
- B. Copper
- C. titanium
- D. Molybdenum
|
| 7 |
At the time of partition, How many industries wee present in Pakistan. |
|
| 8 |
The number of carbon atoms present in petroleum ether. |
- A. 1-5
- B. 2-5
- C. 3-7
- D. 5-7
|
| 9 |
Froth flotation process is used to concentrate the ore on: |
- A. Density basis
- B. Concentration basis
- C. Wetting basis
- D. Magnetic basis
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| 10 |
When CO<sub>2</sub> is passed through the ammonical brine the only salt that precipitates is: |
- A. NaHCO<sub>3</sub>
- B. NH<sub>4</sub>HCO<sub>3</sub>
- C. Na<sub>2</sub>CO<sub>3</sub>
- D. (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub>
|