MCQOPTIONS
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MCQOPTIONS
This section includes 625 Mcqs, each offering curated multiple-choice questions to sharpen your GK knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Why does the color of tomatoes turn red when ripe? |
| A. | Chlorophyll |
| B. | Acetic acid |
| C. | Chromoplast |
| D. | Due to cytoplasm |
| Answer» D. Due to cytoplasm | |
| 252. |
Radio waves are reflected from which part of the atmosphere- |
| A. | Ionosphere |
| B. | Stratosphere |
| C. | Mesosphere |
| D. | None of these |
| Answer» B. Stratosphere | |
| 253. |
Which one is known as magnetite- |
| A. | $$Fe_2O_3$$ |
| B. | $$Fe_2O_3.3H_2O$$ |
| C. | $$FeS_2$$ |
| D. | $$Fe_3O_4$$ |
| Answer» E. | |
| 254. |
When the snowflake melts, the result will be- |
| A. | will change in water level |
| B. | will remain unchanged in the water level |
| C. | water level will decrease |
| D. | water level will rise |
| Answer» C. water level will decrease | |
| 255. |
The rotations per second of a wheel that spins at an accelerating rate are measured by |
| A. | Chronometer |
| B. | hydrometer |
| C. | calipers |
| D. | stroboscope |
| Answer» E. | |
| 256. |
Plant which does not bear flower but have seed |
| A. | Orchides |
| B. | Gymnoperm |
| C. | Angiosperm |
| D. | Crytogamus |
| Answer» C. Angiosperm | |
| 257. |
When a wave is intercepted by an article, the rays bend round the obstacle particle. The phenomenon is known as- |
| A. | Interference |
| B. | Diffraction |
| C. | Polarisation |
| D. | Total internal reflection |
| Answer» C. Polarisation | |
| 258. |
Due to the increase in the amount of carbon dioxide in the atmosphere- |
| A. | Rises in temperature |
| B. | Decrease in temperature |
| C. | Change according to season |
| D. | Continuous decrease in temperature |
| Answer» B. Decrease in temperature | |
| 259. |
The basic structural and functional unit of living organisms is- |
| A. | Cell |
| B. | Tissue |
| C. | Organ |
| D. | Systems |
| Answer» B. Tissue | |
| 260. |
Who invented the rabies vaccine? |
| A. | Hanfree Davy |
| B. | Charles Darwin |
| C. | Lewis Pasteur |
| D. | none of these |
| Answer» D. none of these | |
| 261. |
The colour of the ocean appears to be blue because the sunlight falling on it is- |
| A. | Reflected |
| B. | Refracted |
| C. | Diffracted |
| D. | Scattered |
| Answer» E. | |
| 262. |
Raindrops are spherical- |
| A. | falling from above |
| B. | due to surface tension |
| C. | due to viscosity of water |
| D. | due to air friction |
| Answer» C. due to viscosity of water | |
| 263. |
In what form is phosphate found in bones? |
| A. | vitamin |
| B. | calcium |
| C. | Protein |
| D. | Energy |
| Answer» C. Protein | |
| 264. |
Which of the following metals is known as coin metal? |
| A. | Copper |
| B. | Silver |
| C. | Gold |
| D. | All of the above |
| Answer» E. | |
| 265. |
The best means of extinguishing petrol fires is- |
| A. | Baking Powder |
| B. | Carbon dioxide |
| C. | Sand |
| D. | Water |
| Answer» C. Sand | |
| 266. |
Which of the following is the hardest substance? |
| A. | Platinum |
| B. | Diamond |
| C. | Gold |
| D. | Silver |
| Answer» C. Gold | |
| 267. |
The hydrogen burning process is directly associated with: |
| A. | Oxidation |
| B. | Hydrogenation |
| C. | Hydrolysis |
| D. | Reduction |
| Answer» B. Hydrogenation | |
| 268. |
The rusting of the iron is the example of: |
| A. | Polymerisation |
| B. | D.Galvanization |
| C. | Oxidation |
| D. | Reduction |
| Answer» D. Reduction | |
| 269. |
Alkaline solution is the value of Ph. |
| A. | Less than 7 |
| B. | More than 7 |
| C. | Zero |
| D. | 7 |
| Answer» C. Zero | |
| 270. |
Which branch of science is studied under the bones? |
| A. | Orology |
| B. | Osteology |
| C. | Ceramology |
| D. | Geology |
| Answer» C. Ceramology | |
| 271. |
Sericulture is called |
| A. | Apiculture |
| B. | Sericulture |
| C. | Psiculture |
| D. | Horticulture |
| Answer» C. Psiculture | |
| 272. |
The study of Oncology is |
| A. | Birds |
| B. | Cancer |
| C. | Mammal creature |
| D. | Land |
| Answer» C. Mammal creature | |
| 273. |
The two planets which have no satellites are: |
| A. | Mercury and Mars |
| B. | Venus and Mars |
| C. | Earth and Uranus |
| D. | Mercury and Venus |
| Answer» E. | |
| 274. |
X-rays were discovered by ________. |
| A. | Faraday |
| B. | Roington |
| C. | H. Devi |
| D. | Lavoisier |
| Answer» C. H. Devi | |
| 275. |
Which of the following are resistors? |
| A. | Copper |
| B. | Aluminium |
| C. | Silver |
| D. | All of the above |
| Answer» E. | |
| 276. |
For photosynthesis green plants require: |
| A. | Light |
| B. | Carbon dioxide and water |
| C. | Chlorophyll only |
| D. | All of the above |
| Answer» E. | |
| 277. |
The theory of origin of life on earth is proposed by: |
| A. | Harold C. Urey |
| B. | Lamarck |
| C. | Haldane |
| D. | Stanley Miller |
| Answer» D. Stanley Miller | |
| 278. |
The sweetest sugar is |
| A. | sucrose |
| B. | glucose |
| C. | fructose |
| D. | lactose |
| Answer» D. lactose | |
| 279. |
DPT is a vaccine for |
| A. | Diarrhoea, polio and typhoid |
| B. | diphtheria, whooping cough and tetanus |
| C. | diarrhoea, polio and tetanus |
| D. | diphtheria, whooping cough and typhoid |
| Answer» C. diarrhoea, polio and tetanus | |
| 280. |
Which of the following is skin disease? |
| A. | Anaemia |
| B. | Pellagra |
| C. | Osteomalacia |
| D. | Rickets |
| Answer» C. Osteomalacia | |
| 281. |
The light year is the unit of |
| A. | Time |
| B. | Distance |
| C. | Intensity |
| D. | Weight |
| Answer» C. Intensity | |
| 282. |
Speed of sound is greater in solids than in liquids because |
| A. | The atoms in solids are regularly arranged |
| B. | The atoms in liquids are loosely packed |
| C. | The solids have high elasticity |
| D. | None of the above |
| Answer» D. None of the above | |
| 283. |
Optic fibers are mainly used for which of the following? |
| A. | Communication |
| B. | Weaving |
| C. | Musical instruments |
| D. | Food industry |
| Answer» B. Weaving | |
| 284. |
During sleep a man's blood pressure |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | fluctuates |
| Answer» C. remains constant | |
| 285. |
The pitch of the voice of the women is generally |
| A. | same as that of men |
| B. | higher than that of men |
| C. | much lower than that of men |
| D. | none of the above |
| Answer» C. much lower than that of men | |
| 286. |
What is the SI unit of electric charge? |
| A. | Volts |
| B. | Coulomb |
| C. | Kelvin |
| D. | Kilogram |
| Answer» D. Kilogram | |
| 287. |
What are the functions of thyroid gland in the body? |
| A. | Controls metabolism |
| B. | Maintain internal homeostasis |
| C. | Controls breathing and heart rate |
| D. | All of the above |
| Answer» E. | |
| 288. |
Too much release of thyroid hormone in the body causes: |
| A. | Hypothyroidism |
| B. | Hyperthyroidism |
| C. | Goitre |
| D. | None of the above |
| Answer» C. Goitre | |
| 289. |
Which of the following instrument is used to measure Soil Water Tension? |
| A. | Photometer |
| B. | Pyrometer |
| C. | Psychrometer |
| D. | Tensiometer |
| Answer» E. | |
| 290. |
Why does a Blackboard appear black in colour? |
| A. | It reflects black colour |
| B. | It absorbs black colour |
| C. | It reflects all colour |
| D. | It absorbs all colour |
| Answer» E. | |
| 291. |
What is the minimum distance (in metres) required to hear an echo? |
| A. | 10 |
| B. | 13 |
| C. | 17 |
| D. | 2 |
| Answer» D. 2 | |
| 292. |
What does PSLV stand for ? |
| A. | Polar Sunlight Launch Vehicle |
| B. | Polar Space Launch Vehicle |
| C. | Polar Satellite Launch Vehicle |
| D. | Public Satellite Launch Vehicle |
| Answer» D. Public Satellite Launch Vehicle | |
| 293. |
The energy of wind is |
| A. | Only Potential |
| B. | Only Kinetic |
| C. | Electrical |
| D. | Potential & Kinetic both |
| Answer» C. Electrical | |
| 294. |
Which is the second most abundant element in the universe? |
| A. | Hydrogen |
| B. | Helium |
| C. | Nitrogen |
| D. | Iron |
| Answer» C. Nitrogen | |
| 295. |
From which of the following can Ethanol be obtained? |
| A. | Rice |
| B. | Sunflower |
| C. | Sugarcane |
| D. | Petrol |
| Answer» D. Petrol | |
| 296. |
Which gas is used in the food packaging industry to prevent chips from getting oxidized? |
| A. | Nitrogen |
| B. | Hydrogen |
| C. | Helium |
| D. | Carbon |
| Answer» B. Hydrogen | |
| 297. |
Study of birds is called? |
| A. | Ornithology |
| B. | Entomology |
| C. | Birdology |
| D. | Herpetology |
| Answer» B. Entomology | |
| 298. |
What is the name of the dog that first went into space? |
| A. | Jules |
| B. | Laika |
| C. | Roger |
| D. | Sputnik |
| Answer» C. Roger | |
| 299. |
Weight of an object on the moon is ______ the weight of the object on earth. |
| A. | 1/5th |
| B. | 1/2th |
| C. | 1/6th |
| D. | Equal to |
| Answer» D. Equal to | |
| 300. |
The force that a neutron exerts on a proton inside an atom is: |
| A. | Nuclear force |
| B. | Gravitational force |
| C. | Tidal force |
| D. | Electrostatic force |
| Answer» B. Gravitational force | |