| 1 |
Formula of Urea is. |
- A. KCNO
- B. H<sub>2</sub>N-CO-NH<sub>2</sub>
- C. HN-CO<sub>2</sub>-NH
- D. H<sub>3</sub>N-CO-NH<sub>3</sub>
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| 2 |
The number of carbon atoms present in gasoline or petrol. |
- A. 5-10
- B. 6-10
- C. 7-10
- D. 8-10
|
| 3 |
Which one of the not metal. |
- A. Copper
- B. Carbon
- C. chromium
- D. Iron
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| 4 |
The raw materials for the manufacturing of urea are. |
- A. Ammonia
- B. Carbondioxide
- C. Limestone
- D. a & b
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| 5 |
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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| 6 |
When crude oil is heated in the fractionating tower: |
- A. Vapour of higher boiling point fraction condense first in the lower part of the tower.
- B. Vapours of lower boiling point fraction condense first in the lower part of tower.
- C. Vapour of higher boiling point condense lather in the upper part of tower.
- D. Vapours of higher boiling point never condense.
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| 7 |
The number of carbon atoms present in petroleum ether. |
- A. 1-5
- B. 2-5
- C. 3-7
- D. 5-7
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| 8 |
Concentration of copper are is carried out by process. |
- A. Roasting
- B. Forth floatation
- C. Gravity sepration
- D. Electrostatic separation
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| 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 |
the chemical formula of chalcopyrite is: |
- A. Cu<sub>2</sub>S
- B. CuFe<sub>2</sub>S
- C. CuS
- D. FeS
|