| 1 |
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
|
| 2 |
Concentration is process of: |
- A. Mixting technique
- B. Separating technique
- C. Boiling technique
- D. Cooling techique
|
| 3 |
Sodium carbonate is manufactured by. |
- A. Haber's process
- B. Ostwald's process
- C. Solvay's process
- D. All
|
| 4 |
Bister copper is pure about; |
- A. 70%
- B. 80%
- C. 90%
- D. 98%
|
| 5 |
When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of: |
- A. Cu2S + Cu2O
- B. Cu2O +FeS
- C. Cu2S + FeS
- D. FeO + SO2 + Cu2S
|
| 6 |
How many percentage blister copper is pure? |
- A. 95%
- B. 75%
- C. 98%
- D. 100%
|
| 7 |
Which one of the following is used as jet fuel. |
- A. Kerosene oil
- B. Lubricating oil
- C. Fuel oil
- D. Diesel oil
|
| 8 |
Brown hair contains. |
- A. Iron compound
- B. Copper compound
- C. titanium compound
- D. Both a and b
|
| 9 |
Process of heating the concentrated ore to high temperature in excess of air is called. |
- A. Roasting
- B. Smelting
- C. Bessemerization
- D. All
|
| 10 |
Imperial chemical industries was established in. |
- A. 1942
- B. 1944
- C. 1950
- D. 1990
|