| 21 | As the amount of clay in a soil increases, its water retaining capacity | Increases |
| 22 | Acid rain contains high levels of | Sulphuric and nitric acids |
| 23 | The amount of energy in wheat is | 348 K Calories / 100 gm |
| 24 | Recording of brain waves from outer surface of head is called | E.E.G |
| 25 | Which one of the following units represents the largest amount of energy? | Calorie |
| 26 | The function of haemoglobin is | To transport oxygen |
| 27 | In an oil lamp, the oil rises up in the wick due to | Capillary action |
| 28 | In which system of units, gas bills are charged? | BTU |
| 29 | The sun appears red at sunrise and sunset while it appears white at noon, because | Of scattering of light due to dust particles and air molecules |
| 30 | Which part of the camera is analogue to the retina in the human eye? | Film |