| 1 |
Chemical formula of copper glance is: |
- A. Cu2O
- B. Cu2S
- C. CuFeS2
- D. CuSO4
|
| 2 |
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>
|
| 3 |
Concentration is a . |
- A. Mixing technique
- B. Separating technique
- C. Boiling technique
- D. cooling technique
|
| 4 |
Which one of the following is not faction of crude oil. |
- A. Paraffin wax
- B. Asphalt
- C. Fuel oil
- D. Petroleum coke
|
| 5 |
Blonde hair contains compounds of: |
- A. molybdenum
- B. iron
- C. titanium
- D. copper
|
| 6 |
Concentration of the copper ore is carried out by: |
- A. Calcinations
- B. Roasting
- C. Forth flotation
- D. Distillation
|
| 7 |
The number of carbon atoms present in petroleum ether. |
- A. 1-5
- B. 2-5
- C. 3-7
- D. 5-7
|
| 8 |
Crude oil is heated to the fractionating furnace upto. |
- A. 300 <sup>o</sup>C
- B. 350<sup>o</sup>C
- C. 400<sup>o</sup>C
- D. 450<sup>o</sup>C
|
| 9 |
Compound of metal exist under earth crust are called. |
- A. Ore
- B. Gangue
- C. Minral
- D. None of these
|
| 10 |
How many % age of nitrogen present in air by volume? |
- A. 70%
- B. 75%
- C. 78%
- D. 80%
|