| 151 | Radar transmits short pulses of high frequency called | Radio waves |
| 152 | Nitrogen occurs in plants and animals in the form of | Proteins |
| 153 | The amount of energy provided by eggs is | 150 K Calories / 100 gm |
| 154 | A nuclear reactor harnesses nuclear energy by | Controlled chain reaction |
| 155 | Bats can also fly in dark because they are capable of taking the help of | Ultrasonic Waves |
| 156 | Which type of blood of individuals are universal recipients? | Type A, B |
| 157 | Water is a universal solvent for what reactions? | Biochemical |
| 158 | What does make the blood look red? | Plasma |
| 159 | What is used in making of alloys? | Chromium |
| 160 | Vinegar is prepared by the | Fermentation of rotten grapes. |
| 161 | Video camera is used to convert | Picture into electrical signals |
| 162 | Where is blood formed in the human body? | Heart |
| 163 | Silicon is a (n) | Semi-conductor |
| 164 | The range of a 100 meter high T.V. transmitter are is about | 30 km |
| 165 | Acid rain contains high levels of | Sulphuric and nitric acids |
| 166 | For sending sound waves at large distance, which waves are used? | Radio waves |
| 167 | Which one of the following metals pollutes the air of a city having large number of automobiles? | Lead |
| 168 | A lake starts freezing because of the cold atmosphere. It will first freeze | At the top surface |
| 169 | The waves used for sending signals to the satellite from ground station are | Micro waves |
| 170 | The second most abundant metal found in the earth's crust is | Iron |
| 171 | Pituitary gland is located just below the | Brain |
| 172 | As the amount of clay in a soil increases, its water retaining capacity | Increases |
| 173 | The primary function of the feathers in birds is to | Provide stinking surface to the wings for flying |
| 174 | Heating element of an electric heater is made up of | Nichrome |
| 175 | For water purification, we use | Chlorine |
| 176 | Triple antigen vaccine is given to children to protect them against | Whooping cough |
| 177 | The Green House Effect is caused by an excess of | Carbon dioxide |