| 1 |
Composition of carbon in the diesel oil. |
- A. C<sub>7</sub>-C<sub>10</sub>
- B. C<sub>10</sub>-C<sub>12</sub>
- C. C<sub>13</sub>-C<sub>15</sub>
- D. C<sub>15</sub>-C<sub>18</sub>
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| 2 |
Ammonia is prepared by: |
- A. Solvay's process
- B. Haber's process
- C. Floatation process
- D. Bayer's process
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| 3 |
Which one of the ore of copper? |
- A. Copper glance
- B. Chalcopyrite
- C. Both a and b
- D. None of these
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| 4 |
Concentration is a . |
- A. Mixing technique
- B. Separating technique
- C. Boiling technique
- D. cooling technique
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| 5 |
Brown hair contains. |
- A. Iron compound
- B. Copper compound
- C. titanium compound
- D. Both a and b
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| 6 |
Which one of the following is not faction of crude oil. |
- A. Paraffin wax
- B. Asphalt
- C. Fuel oil
- D. Petroleum coke
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| 7 |
The number of carbon atoms present in diesel oil. |
- A. 10-15
- B. 11-15
- C. 12-15
- D. 13-15
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| 8 |
The number of carbon atoms present in kerosene oil. |
- A. 8-12
- B. 9-12
- C. 10-12
- D. 11-12
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| 9 |
The process of roasting during metallurgy of copper is carried out in a special furnace called. |
- A. Blast furnace
- B. Fire furnace
- C. Bessemer converter
- D. Reverberatory furnace
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| 10 |
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
|