| 1 |
Oxidation means |
- A. Gain of oxygen
- B. Removal of oxygen
- C. Gain of hydrogen
- D. Gain of electrons
|
| 2 |
In silver plating Anode is made of: |
- A. Gold
- B. Ag
- C. Neon
- D. Nil
|
| 3 |
In the redox reaction between zn and HCI. the oxidizing agent is:<br> |
- A. zn <br>
- B. H<sup>+</sup>
- C. C
- D. H<sup>2</sup>
|
| 4 |
By electrolytic refining of copper , it is ____________ % pure. |
- A. 98
- B. 99
- C. 99.99
- D. 100
|
| 5 |
Which one is strong electrolyte ? |
- A. NH4OH
- B. NaOH
- C. a & b
- D. Nil
|
| 6 |
Which one of the following is not an electrolytic cell:<br> |
- A. Down cell<br>
- B. Galvanic cell <br>
- C. Nelson' cell <br>
- D. Both a and c<br>
|
| 7 |
____________ of copper is done by electrolysis. |
- A. Production
- B. Refining
- C. Both
- D. Nil
|
| 8 |
____________ cell is made of two half of cells. |
- A. Zinc cell
- B. Galvanic
- C. Both
- D. All
|
| 9 |
Br2 + H2S __ 2HBr + S, which one is oxidizing agent: |
- A. H2S
- B. Br2
- C. S
- D. 2HBr
|
| 10 |
Electrolyte is ____________ solid form. |
- A. in
- B. Sometimes in
- C. Never in
- D. Always in
|
