| 1 |
Which is used for industrial manufacture of NaCI? |
- A. Daniel cell
- B. Down's cell
- C. Nelson's cell
- D. None of these
|
| 2 |
Which one of the following is not an electrolyte?<br> |
- A. sugar solution<br>
- B. sulphuric acid solution<br>
- C. Lime solution<br>
- D. Sodium chloride solution<br>
|
| 3 |
____________ of copper is done by electrolysis. |
- A. Production
- B. Refining
- C. Both
- D. Nil
|
| 4 |
It is a good reducing agent |
|
| 5 |
Addition of OXYGEN is called. |
- A. Reduction
- B. Conduction
- C. Oxidation
- D. Nil
|
| 6 |
Which one is strong electrolyte ? |
- A. NH4OH
- B. NaOH
- C. a & b
- D. Nil
|
| 7 |
The oxidation number of chromium in K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> is:<br> |
- A. +2<br>
- B. +6<br>
- C. +7<br>
- D. +14<br>
|
| 8 |
By electrolytic refining of copper , it is ____________ % pure. |
- A. 98
- B. 99
- C. 99.99
- D. 100
|
| 9 |
In silver plating Anode is made of: |
- A. Gold
- B. Ag
- C. Neon
- D. Nil
|
| 10 |
Copper extracted from its ore is ____________ % pure. |
- A. 98%
- B. 99%
- C. 96%
- D. Nil
|
