| 51. | Calcium carbide on treating with water gives? |
A. methane | |
B. ethane | |
C. ethylene | |
D. acetylene |
| 52. | Where is chlorofluorocarbon mostly used? |
A. in micro ovens | |
B. in solar heaters | |
C. in washing machines | |
D. in refrigerators |
| 53. | Which of the following is a common refrigerant used as a domestic refrigerator? |
A. Neon | |
B. oxygen | |
C. freon | |
D. none |
| 54. | The famous refrigerant freon is actually |
A. calcium fluoride | |
B. fluorospar | |
C. hydrofolic acid | |
D. dichlorofluoro methane |
| 55. | Which of the following gas is causing the depletion of the ozone layer? |
A. nitrous oxide | |
B. chlorofluorocarbon | |
C. carbon oxide | |
D. carbon monoxide |
| 56. | Trichloro methane is the chemical name of which of the following |
A. naval officer | |
B. chloroform | |
C. chlorofluorocarbon | |
D. ideoform |
| 57. | Which of the following statements is correct regarding chloroform? 1. Liquid fuel 2. Anesthetic 3. Produces phosgene 4. Fire extinguisher. Code : |
A. 1 and 2 | |
B. 1 and 3 | |
C. 2 and 3 | |
D. 1 and 4 |
| 58. | What other chemical name is carbon tetrachloride known by? |
A. marsh gas | |
B. mustard gas | |
C. pyrene | |
D. pyrole |
| 59. | used to extinguish electrical fires |
A. pyrene fire extinguisher | |
B. foam fire extinguisher | |
C. water fire extinguisher | |
D. soda acid fire extinguisher |
| 60. | Which of the following solvents is used for dry cleaning of clothes? |
A. chloroform | |
B. acetone` | |
C. ethyl alcohol | |
D. carbon tetrachloride |