| 1 |
Chalco-pyite is an ore of: |
- A. iron
- B. aluminium
- C. silver
- D. copper
|
| 2 |
On which bases froth floatation process take place? |
- A. Density bases
- B. Concentration basis
- C. Watting basis
- D. None of these
|
| 3 |
How many % age of nitrogen in urea fertilizers? |
- A. 40.6
- B. 45.6
- C. 46.6
- D. 50
|
| 4 |
Petroleum fraction having composition C<sub>5</sub> to C<sub>7</sub> is. |
- A. Petroleum Gas
- B. Petroleum Ether
- C. Kerosine oil
- D. Gasoline or petrol
|
| 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>
|
| 6 |
In solvay's process slaked lime is used to: |
- A. Prepare CO<sub>2</sub>
- B. Prepare quick lime
- C. Recover ammonia
- D. Form Na<sub>2</sub>CO<sub>3</sub>
|
| 7 |
Concentration is a . |
- A. Mixing technique
- B. Separating technique
- C. Boiling technique
- D. cooling technique
|
| 8 |
The nitrogen present in urea is used by plants to synthesize. |
- A. Sugar
- B. Proteins
- C. Fats
- D. DNA
|
| 9 |
Which one of the following is not a fraction of petroleum? |
- A. Kerosene oil
- B. Diesel oil
- C. Alcohol
- D. Petrol
|
| 10 |
Blonde hair contains compounds of: |
- A. molybdenum
- B. iron
- C. titanium
- D. copper
|