| 1 |
In dry cleaning, which chemical is used. |
- A. Chloroform
- B. Carbon tetachloride
- C. Ecetaldehyde
- D. Ethanol
|
| 2 |
Which are called paraffines? |
- A. Alkyle
- B. Alkynes
- C. Alkenes
- D. Alkanes
|
| 3 |
Halogenation of methane on the presence of diffused sunlight takes place. |
- A. Only in one step
- B. Slowly in one step
- C. Freshly in two steps
- D. In a series of four steps
|
| 4 |
____________ use for ripening of fruits. |
- A. Ethene
- B. Ethane
- C. Ethyne
- D. Propane
|
| 5 |
A hydrocarbon has molecular formula C<sub>8</sub>H<sub>14</sub>. What is the molecular formula of the next number of the same homologous series. |
- A. C<sub>9</sub>H<sub>18</sub>
- B. C<sub>9</sub>H<sub>16</sub>
- C. C<sub>9</sub>H<sub>20</sub>
- D. C<sub>9</sub>H<sub>12</sub>
|
| 6 |
Which one of the following is polmerized to from benzene? |
- A. ethane
- B. ethene
- C. methane
- D. ethyne
|
| 7 |
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>
|
| 8 |
Substitution reaction is the characteristics of. |
- A. Alkanes
- B. Alkenes
- C. Alkynes
- D. None of these
|
| 9 |
The order or reactivity of hydrogen halides with alkenes is. |
- A. HI/Br
- B. HBr > HI
- C. HCl > HBr
- D. HBr>HCl
|
| 10 |
Traces of acetylene are present to coal gas about. |
- A. 0.06 %
- B. 0.08%
- C. 1.1 %
- D. 90%
|