| 1 |
Gain of electrons in a reaction is called ____________reaction. |
- A. Oxidation
- B. Reduction
- C. Both
- D. Nil
|
| 2 |
CO2 the oxidation number of C =. |
|
| 3 |
By electrolytic refining of copper , it is ____________ % pure. |
- A. 98
- B. 99
- C. 99.99
- D. 100
|
| 4 |
Which is used for industrial manufacture of NaCI? |
- A. Daniel cell
- B. Down's cell
- C. Nelson's cell
- D. None of these
|
| 5 |
Electrolyte is ____________ solid form. |
- A. in
- B. Sometimes in
- C. Never in
- D. Always in
|
| 6 |
Spontaneous chemical reactions take place in:<br> |
- A. electrolytic cell <br>
- B. Galvanic cell <br>
- C. Nelson' s cell <br>
- D. downs cell <br>
|
| 7 |
____________ is prevented by Metallic coating. |
- A. NaCl
- B. Rust
- C. All
- D. None of these
|
| 8 |
Which one is not a property of electrolytic cell? |
- A. It consists of one complete cell
- B. Anode has +ve charge
- C. It converts electrical energy into chemical one
- D. Anode has -ve charge
|
| 9 |
All electrolytes are: |
- A. Conductor
- B. Insulator
- C. Semi conductor
- D. Nil
|
| 10 |
____________ are good conductors of electricity. |
- A. Covalent compound
- B. Metals
- C. Both
- D. None of these
|
