| 1 |
the chemical formula of chalcopyrite is: |
- A. Cu<sub>2</sub>S
- B. CuFe<sub>2</sub>S
- C. CuS
- D. FeS
|
| 2 |
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>
|
| 3 |
Which one of the following organic compound is found is gasoline? |
- A. C<sub>2</sub>H<sub>4</sub>
- B. C<sub>3</sub>H<sub>8</sub>
- C. C<sub>7</sub>H<sub>10</sub>
- D. C<sub>12</sub>H<sub>26</sub>
|
| 4 |
In the bessemerization process. |
- A. Roasted ore is beated.
- B. Molten matte is removed.
- C. Molten matte is heated
- D. Molten matte is added
|
| 5 |
Blonde hair contains compounds of: |
- A. molybdenum
- B. iron
- C. titanium
- D. copper
|
| 6 |
How many % age of nitrogen in urea fertilizers? |
- A. 40.6
- B. 45.6
- C. 46.6
- D. 50
|
| 7 |
Which one of the following is used as jet fuel. |
- A. Kerosene oil
- B. Lubricating oil
- C. Fuel oil
- D. Diesel oil
|
| 8 |
Which one is not the fraction of residual oil? |
- A. Paraffin wax
- B. Asphalt
- C. Fuel oil
- D. Coke
|
| 9 |
In smelting process a small amount of coke is required because: |
- A. it is highly endothermic process
- B. it is highly exothermic process
- C. it is very fast process
- D. it is very slow process
|
| 10 |
Ammonia is prepared by: |
- A. Solvay's process
- B. Haber's process
- C. Floatation process
- D. Bayer's process
|