| 1 |
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>
|
| 2 |
Which one is strong electrolyte ? |
- A. NH4OH
- B. NaOH
- C. a & b
- D. Nil
|
| 3 |
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>
|
| 4 |
Spontaneous chemical reactions take place in:<br> |
- A. electrolytic cell <br>
- B. Galvanic cell <br>
- C. Nelson' s cell <br>
- D. downs cell <br>
|
| 5 |
Br2 + H2S __ 2HBr + S, which one is oxidizing agent: |
- A. H2S
- B. Br2
- C. S
- D. 2HBr
|
| 6 |
Addition of OXYGEN is called. |
- A. Reduction
- B. Conduction
- C. Oxidation
- D. Nil
|
| 7 |
Gain of electrons in a reaction is called ____________reaction. |
- A. Oxidation
- B. Reduction
- C. Both
- D. Nil
|
| 8 |
In peroxides, the oxidation no. of O is |
|
| 9 |
____________ cell is made of two half of cells. |
- A. Zinc cell
- B. Galvanic
- C. Both
- D. All
|
| 10 |
Brine is an aqueous solution of |
- A. NaCI
- B. NaOH
- C. AgNO3
- D. CaO
|
