| 151 | Bismuth was discovered by | Valentine |
| 152 | The biggest plant seed is | Cocodemer |
| 153 | Toxicology is the study of | Poisons |
| 154 | Virology is the study of | Viruses |
| 155 | Paleontology is the study of | Fossils |
| 156 | Calorimeter is used to measure | Quantity of heat |
| 157 | Chronometer was invented by | John Harrison |
| 158 | Stethoscope was invented by | William Stockes |
| 159 | Spinning frame was invented by | Sir Richard Arkwright |
| 160 | Al stands for | Aluminium |
| 161 | Gd stands for | Gadolinium |
| 162 | Ir stands for | Iridium |
| 163 | Bi stands for | Bismuth |
| 164 | The Chemical formula of sodium bicarbonate is | NaHCO3 |
| 165 | The chemical formula of common salt is | Nacl |
| 166 | The chemical formula of washing soda is | Na2CO3,IOH2O |
| 167 | The chemical formula of lime soda is | CaCO3 |
| 168 | The chemical formula of chloroform is | CHcl3 |
| 169 | The study of grasses is known as | Agrostology |
| 170 | The study of antiquities is known as | Archaeology |
| 171 | The study of the duration of life is known as | Chronobiology |
| 172 | The study of bacteria is known as | Bacteriology |
| 173 | Nylon was invented by | Dr.Wallace H.Carothers |
| 174 | Electric razor was invented by | Jacob Schick |
| 175 | The symbol of silver is | Ag |
| 176 | The symbol of silicon is | Si |
| 177 | The symbol of titanium is | Ti |
| 178 | Calcium oxide is commonly known as | Quick lime |
| 179 | A deviation of light passing from one medium to another is known as | Refraction |
| 180 | An apparatus for generation of atomic energy is called a | Reactor |
| 181 | A machine used for converting mechanical energy into electrical energy is called a | Generator |
| 182 | The first Indian woman in space was | Kalpana Chawla |
| 183 | The revolver was invented by | Samuel Colt |
| 184 | The refrigerator was invented by | J.Perkins |
| 185 | Which is the only common metal that is liquid at room temperature? | Mercury |
| 186 | When a fire is caused by an electric short circuit, why must you not throw water? | If you throw water on a fire caused due to short circuit, you may be electrocuted because water is a good conductor of electricity. |
| 187 | Why do we see lightning much before we hear thunder? | This is because light travels much faster than sound. Light travels @ 2.99 x 108 mt / sec (2,99,000 km/sec) whereas sound travels @ 333 mt/sec. |
| 188 | Which planet is the closest to the Sun? | Mercury |
| 189 | Which is the hottest planet? | Venus |
| 190 | How much time does the earth take to complete a revolution around the sun? | 365 % days. |
| 191 | Why are whales hunted? | For the blubber or the oil in them. |
| 192 | Where do platypuses live? | In burrows near water. |
| 193 | How many days does the moon take to go round the earth? | 27 1/3 days. |
| 194 | Among the insects that are extant, (that are living still), which is the most ancient? | Cockroach. |
| 195 | What is meant by fulcrum? | Fulcrum is the point about which a bar or lever will rotate, when a force is applied at any distance from that point or axis. |
| 196 | What kind of leaves do silkworms thrive on? | Mulberry leaves. |
| 197 | Why is it dangerous to look at die sun during an eclipse? | During solar eclipse, the ultraviolet rays are in such high proportion in sunrays, that they can cause irrepairable damage to the eye. |
| 198 | How does a Pitcher Plant eat flies? | A Pitcher Plant is hollow and tubular. The surfaces are slippery and they have hairs, which point downwards. When an insect lands on a pitcher plant, it is impossible for it to escape because of the slippery surface and the downward-pointed hairs. It is then easily digested. |
| 199 | What is the Indian name for the planet Mercury? | Budha. |
| 200 | Where in India do the migratory cranes of Siberia settle down? | The Rann of Kutch. |
I’m Nitesh Brithwal Nanu , An Indian Engineer who is passionate about technology , current affairs , general Knowledge & programming . Constantly learning and experiencing new things.
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