| 1 |
If strip of Cu metal is placed in the solution of FeSO4 |
- A. Cu will be precipitated out
- B. Fe is precipitated out
- C. Cu and Fe both dissolves
- D. No reaction takes place
|
| 2 |
In a electrolytic cell the electrons flow from |
- A. Cathode to anode
- B. Anode to cathode
- C. From cathode to anode or opposite, depending upon the nature of electrolyte
- D. All of the above
|
| 3 |
In which compound oxidation state of chlorine is +5 |
- A. NaCl
- B. HOCl
- C. NaClO3
- D. NaClO2
|
| 4 |
The oxidation number of C in C12H22O11 is |
- A. Zero
- B. - 6
- C. + 6
- D. 12
|
| 5 |
The oxidation of O -atom in OF3 is. |
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| 6 |
The electrode reaction of a voltaic cell can be reversed when |
- A. Concentrations of solutions are changed
- B. Temperature is increased
- C. Electrodes are interchanged
- D. Electric circuit is employed to supply the source of electricity
|
| 7 |
According to classical concept, oxidation involves |
- A. Addition of oxygen
- B. Addition of electron
- C. Removal of hydrogen
- D. All are correct
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| 8 |
The cathodic reaction in the electrolysis of dill. H<sub>2</sub>SO<sub>4</sub>with Pt electrodes is |
- A. Reduction
- B. Oxidation
- C. Both oxidation and reduction
- D. Neither oxidation nor reduction
|
| 9 |
Which has greater reduction potential |
|
| 10 |
If the salt bridge is not used between two half cells, then the voltage. |
- A. Decrease rapidly
- B. Decrease slowly
- C. Drops to zero
- D. Does not change
|