| 1 |
Oxidation means |
- A. Gain of oxygen
- B. Removal of oxygen
- C. Gain of hydrogen
- D. Gain of electrons
|
| 2 |
Br2 + H2S __ 2HBr + S, which one is oxidizing agent: |
- A. H2S
- B. Br2
- C. S
- D. 2HBr
|
| 3 |
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>
|
| 4 |
In metal hydrides, the oxidation number of hydrogen is |
|
| 5 |
It is a good reducing agent |
|
| 6 |
The formula of rust is:<br> |
- A. Fe<sub>2</sub>O<sub>3</sub>,nH<sub>2</sub>o
- B. Fe<sub>2</sub>O<sub>3</sub>
- C. Fe(OH)<sub>3</sub>-nH<sub>2</sub>O<br>
- D. Fe(OH)<sub>3</sub>
|
| 7 |
The metallic plates through which electrons enters and leaves electrolytes: |
- A. Wires
- B. Electrodes
- C. Both
- D. Nil
|
| 8 |
____________ is an irreversible cell. |
- A. Dry cell
- B. Chargeable cell
- C. Zn cell
- D. None of these
|
| 9 |
Electrolyte is ____________ solid form. |
- A. in
- B. Sometimes in
- C. Never in
- D. Always in
|
| 10 |
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
|
