| 1 |
In metal hydrides, the oxidation number of hydrogen is |
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| 2 |
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>
|
| 3 |
____________ are good conductors of electricity. |
- A. Covalent compound
- B. Metals
- C. Both
- D. None of these
|
| 4 |
Electrolyte is ____________ solid form. |
- A. in
- B. Sometimes in
- C. Never in
- D. Always in
|
| 5 |
The cathode of Daniel cell is made up of |
|
| 6 |
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>
|
| 7 |
The cathode of Nelson's cell is made up of |
|
| 8 |
Formation of water form hydrogen and oxygen is:<br> |
- A. Redox reaction<br>
- B. Acid-base reaction <br>
- C. Neutralization<br>
- D. Decomposition<br>
|
| 9 |
The metallic plates through which electrons enters and leaves electrolytes: |
- A. Wires
- B. Electrodes
- C. Both
- D. Nil
|
| 10 |
The most common example of corrosion is:<br> |
- A. Chemical decay<br>
- B. Rusting of iron<br>
- C. Rusting of aluminum<br>
- D. Rusting of tin<br>
|
