| 1 |
Ethyne is oxidized by alkaline KMnO<sub>4</sub> then ....... hydroxyl group add to the triple bond. |
- A. Two
- B. Three
- C. Four
- D. Five
|
| 2 |
Hydrogenation of alkenes and alkynes takes place at room temperature in the presence of. |
- A. Ni
- B. Pt
- C. Pd
- D. Both a and b
|
| 3 |
In which one of the following is a substitution reaction? |
- A. Halogenations of alkynes
- B. Halogenations of alkenes
- C. Halogenations of alkanes
- D. Bromination of alkenes
|
| 4 |
One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What is the formula could be of the x: |
- A. C<sub>3</sub>H<sub>8</sub>
- B. C<sub>6</sub>H<sub>12</sub>
- C. C<sub>4</sub>H<sub>10</sub>
- D. C<sub>2</sub>H<sub>16</sub>
|
| 5 |
Which hydrocarbon has no effect on an aqueous solution of bromine. |
- A. CH<sub>4</sub>
- B. C<sub>10</sub>H<sub>20</sub>
- C. C<sub>2</sub>H<sub>2</sub>
- D. C<sub>2</sub>H<sub>4</sub>
|
| 6 |
Hydrogenation of alkenes and alkynes may be carried out at room temperature in the presence of catalyst: |
- A. Pt or Pd
- B. Ni
- C. Zn
- D. Fe2O3
|
| 7 |
Which one of the following is polmerized to from benzene? |
- A. ethane
- B. ethene
- C. methane
- D. ethyne
|
| 8 |
The molecular formula of the first three members of the alkane hydrocarbons are CH<sub>4,</sub>C<sub>2</sub>H<sub>6</sub> and C<sub>3</sub>H<sub>8</sub>. What is the molecular formula for the eight alkane member, octane, which is found is petrol? |
- A. C<sub>8</sub>H<sub>8</sub>
- B. C<sub>8</sub>H<sub>16</sub>
- C. C<sub>8</sub>H<sub>18</sub>
- D. C<sub>8</sub>H<sub>20</sub>
|
| 9 |
Ethen is prepared by heating a mixture of ethanol and excess of concentrated sulphuric acid at: |
- A. 150°C
- B. 180°C
- C. 250°C - 300°C
- D. 400°C - 450°C
|
| 10 |
Dehalogenation of tetrahalides produces acetylene. This reaction takes place in the presence of |
- A. Sodium metal
- B. Zinc metal
- C. Magnesium metal
- D. Potassium metal
|
