| 71 | Acid rain contains high levels of | Sulphuric and nitric acids |
| 72 | Triple antigen vaccine is given to children to protect them against | Whooping cough |
| 73 | Ptyalin is an enzyme produced in the | Salivary glands |
| 74 | In BTU system, one BTU is equal to | 1055 Joule |
| 75 | Atmospheric pressure exerted on the earth is due to the | Gravitational pull |
| 76 | Which one of the following raw material is used in the manufacture of foam used in mattresses, cushions, etc.? | Phenol |
| 77 | Units of electricity consumed by 2500 watt air-conditioner in one hour are | 2.5 units |
| 78 | The snow on the mountains does not melt all at once when it is heated by the sun because | It reflects most of the heat from the sun |
| 79 | After drinking contaminated water, you would be most apt to develop symptoms of | Typhoid fever |
| 80 | Which of the following is involved in blood clotting? | Calcium |