| 1 |
Which one of the following is not faction of crude oil. |
- A. Paraffin wax
- B. Asphalt
- C. Fuel oil
- D. Petroleum coke
|
| 2 |
Formula of soda ash is. |
- A. Na<sub>2</sub>CO<sub>3</sub>
- B. NaHCO<sub>3</sub>
- C. Na<sub>2</sub>SO<sub>4</sub>
- D. Na<sub>3</sub>PO<sub>4</sub>
|
| 3 |
Metallurgy involves which of the following steps? |
- A. Mining and enrichment
- B. Reduction
- C. Refining and casting.
- D. All of these
|
| 4 |
Which one of the following is used as jet fuel. |
- A. Kerosene oil
- B. Lubricating oil
- C. Fuel oil
- D. Diesel oil
|
| 5 |
Concentration is process of: |
- A. Mixting technique
- B. Separating technique
- C. Boiling technique
- D. Cooling techique
|
| 6 |
Bister copper is pure about; |
- A. 70%
- B. 80%
- C. 90%
- D. 98%
|
| 7 |
Froth flotation process is used to concentrate. |
- A. Copper ore
- B. Iron ore
- C. Chromium ore
- D. Aluminum ore
|
| 8 |
the chemical formula of chalcopyrite is: |
- A. Cu<sub>2</sub>S
- B. CuFe<sub>2</sub>S
- C. CuS
- D. FeS
|
| 9 |
Urea is nitrogenous fertilizer. It consist of nitrogen. |
- A. 26.6 %
- B. 36.6%
- C. 46.6%
- D. 56.6%
|
| 10 |
Extraction of metals from its ores is called. |
- A. Metallurgy
- B. Mining
- C. Griding
- D. All
|
