| 81 | The sky appears blue because the earth's atmosphere | Reflects blue light |
| 82 | In eye donation, which one of the following parts of donor's eye is utilized? | Cornea |
| 83 | In blood, the percentage of water is | 0.92 |
| 84 | Nitrogen occurs in plants and animals in the form of | Proteins |
| 85 | Materials for rain-proof coats and tents owe their water proof properties to | Surface tension |
| 86 | An astronaut inside a spacecraft is in a state of weightlessness. This implies that | The astronaut is outside the influence of the earth's gravitational force |
| 87 | Water is a universal solvent for what reactions? | Biochemical |
| 88 | The gland which maintains body temperature is the | Thyroid gland |
| 89 | Pituitary gland is located just below the | Brain |
| 90 | Detergents dissolved in water help in cleaning clothes by | Reducing the surface tension of water |