| 1 |
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>
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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>
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| 3 |
In silver plating Anode is made of: |
- A. Gold
- B. Ag
- C. Neon
- D. Nil
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| 4 |
Cu + 2AgNO3 -------> Cu(NO3) +2Ag. In this reaction reducing agent is: |
- A. Cu
- B. AgNO3
- C. Cu(NO3)2
- D. Ag
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| 5 |
Which one of the following is a galvanic cell? |
- A. Daniel cell
- B. Nelson's cell
- C. Down's cell
- D. Both B and C
|
| 6 |
In peroxides, the oxidation no. of O is |
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| 7 |
____________ is prevented by Metallic coating. |
- A. NaCl
- B. Rust
- C. All
- D. None of these
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| 8 |
By electrolytic refining of copper , it is ____________ % pure. |
- A. 98
- B. 99
- C. 99.99
- D. 100
|
| 9 |
____________ is an irreversible cell. |
- A. Dry cell
- B. Chargeable cell
- C. Zn cell
- D. None of these
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| 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
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