| 1 |
General formula of Alkynes is. |
- A. C<sub>6</sub>H<sub>2n-2</sub>
- B. C<sub>n</sub>H<sub>2n+2</sub>
- C. C<sub>11</sub>H<sub>2n-2</sub>
- D. C<sub>n</sub>H<sub>2n-2</sub>
|
| 2 |
Coal having 90% carbon contents is called. |
- A. Peat
- B. Lignite
- C. anthracite
- D. bituminous
|
| 3 |
The coal in which the percentage of carbon is 60% |
- A. Peat
- B. Lignite
- C. Bituminous
- D. Anthracit
|
| 4 |
Pitch is black residue of |
- A. Coke
- B. Coal-tar
- C. Coal
- D. Coal gas
|
| 5 |
Conversion of dead plants into coal by the action of bacteria and heat is called. |
- A. Carbonization
- B. Catenation
- C. Hydrogenation
- D. Cracking
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| 6 |
The black residue of the coal tar is called: |
- A. peat
- B. lignite
- C. pitch
- D. matte
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| 7 |
The general formula of alkane is |
- A. C<sub>n</sub>H<sub>2n+2</sub>
- B. C<sub>n</sub>H<sub>2n-2</sub>
- C. C<sub>n</sub>H<sub>2n</sub>
- D. C<sub>n</sub>H<sub>2n+1</sub>
|
| 8 |
Number of discovered element till today are. |
- A. 140
- B. 118
- C. 90
- D. 16
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| 9 |
In laboratory urea was prepared by |
- A. Wohler
- B. Rutherford
- C. Berzelius
- D. Dalton
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| 10 |
The % age of carbon is coal is |
- A. 40-60
- B. 50-70
- C. 40-80
- D. 40-90
|