| 171. | Which of the following is the main component of LPG? |
A. methane | |
B. ethane | |
C. Propane | |
D. butane |
| 172. | The gas produced due to decomposition of vegetation in some places is – |
A. carbon monoxide | |
B. carbon dioxide | |
C. methane | |
D. mixture of N₂ and O₂ |
| 173. | Which gas is mainly used in cooking |
A. Carbon dioxide | |
B. carbon monoxide | |
C. methane | |
D. mixture of nitrogen and oxygen |
| 174. | Mines are mainly blasted |
A. mixture of oxygen and nitrogen | |
B. mixture of acetylene and oxygen | |
C. methane mixed with air | |
D. carbon dioxide with ethane |
| 175. | Which of the following gas is used in cigarette lighter? |
A. butane | |
B. methane | |
C. Propane | |
D. Redan |
| 176. | From the point of view of safety, what is filled in the cooking LPG gas cylinder to make the gas smelly, so that leakage can be detected? |
A. glycol | |
B. Glycerol | |
C. mercaptan | |
D. alcohol |
| 177. | refrigerant is freon |
A. calcium tetrachloride | |
B. difluoro dichloro methane | |
C. Fluospar and Feldspar | |
D. hydrofluosilicic acid |
| 178. | Which gas is present in both natural gas and biogas? |
A. methane | |
B. Butane | |
C. hydrogen | |
D. carbon monoxide |
| 179. | The area producing methane gas is – |
A. wheat field | |
B. paddy field | |
C. cotton field | |
D. peanut farm |
| 180. | The shape of ethylene molecule is – |
A. planar | |
B. Angular | |
C. linear | |
D. Isotropic |