| 1 |
CO2 the oxidation number of C =. |
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| 2 |
By electrolytic refining of copper , it is ____________ % pure. |
- A. 98
- B. 99
- C. 99.99
- D. 100
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| 3 |
Metals are covered by using. |
- A. Baeyer's test
- B. Bohr's
- C. Electrolysis
- D. None
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| 4 |
It is a good reducing agent |
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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
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| 6 |
Addition of OXYGEN is called. |
- A. Reduction
- B. Conduction
- C. Oxidation
- D. Nil
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| 7 |
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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| 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
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| 9 |
During the formation of water from hydrogen and oxygen, which of the following does not occur?<br> |
- A. Hydrogen has oxidized<br>
- B. oxygen has reduced<br>
- C. oxygen gains electrons<br>
- D. hydrogen behaves as oxidizing agent<br>
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| 10 |
Which one is strong electrolyte ? |
- A. NH4OH
- B. NaOH
- C. a & b
- D. Nil
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