General Science MCQs | 100% Best for Competitive Exams

general science mcqs
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Most Important Questions of General Science / Every Day Science

  1. Which is the outermost planet in the solar system? 

  2. Neptune
  3. The SI unit of charge is? 

  4. Coulomb
  5. Wavelength of very High Frequency (VHF) IS ? 

  6. shorter
  7. Long-sight defect could be corrected by using _____ lens? 

  8. vonvex
  9. For a fixed mass of gas at constant temperature, if we decrease volume, the pressure will _________?

  10. Increase
  11. The lifespan of Red Blood Cells is __________ days? 

  12. 20
  13. The density of water is __________? 

  14. 1 g/cm3
  15. Radioactivity was discovered by __________? 

  16. Bacquerel
  17. The Sun is a __________? 

  18. Star
  19. The average adult has a blood volume of about __________ liters? 

  20. 5
  21. The most abundant element in the universe is __________? 

  22. Hydrogen
  23. The most abundant element in the Earth’s crust is ______? 

  24. Oxygen
  25. Each day human body breathe in ____ liters of air ? 

  26. 15,000 to 20,000
  27. The SI unit of “pressure” is _________? 

  28. pascal
  29. The most densest substance on the Earth is ________? 

  30. Osmium
  31. A camera uses a __________ to form an image? 

  32. convex lens
  33. CNG stands for? 

  34. Compressed Natural Gas
  35. Which from the following is true for “Sound”? 

  36. Sound cannot travel through a vaccum
  37. When white light is passed through a prism, it splits into _______ colours? 

  38. 6
  39. Instrument used for measuring very high temperature is __________.? 

  40. Pyrometer
  41. Sound waves are _________ waves? 

  42. Longitudinal
  43. The lifespan of White Blood Cells is __________ day(s)? 

  44. 1
  45. The fluid part of blood is known as __________? 

  46. plasma
  47. X-rays were discovered by __________?

  48. Rontgen
  49. The speed of light is __________? 

  50. 300,000 km/s
  51. In a very low temperature which from the following will freeze at last? 

  52. Sea water
  53. The nearest planet to the Earth is _________? 

  54. Venus.
  55. The planet that moves round the Sun at the highest speed is? 

  56. Mercury
  57. In general, Comets have __________ orbits? 

  58. Highly elliptical
  59. Oxidation is a chemical reaction involving the __________? 

  60. Loss of Electrons
  61. Urine is produced in __________? 

  62. Kidneys
  63. Blood is cleaned by __________? 

  64. Kidneys
  65. The planet which is easily visible from the Earth is? 

  66. Venus
  67. According to the Big Bang Theory, the Universe began about __________ billion years ago? 

  68. 10 – 20
  69. The biosensor is used to measure? 

  70. Blood glucose level
  71. Einstein’s famous equation which states that mass and energy are interchangeable is? 

  72. E = mc2
  73. The SI unit of electric current is? 

  74. Ampere
  75. For proper formation of teeth, __________ is essential.? 

  76. Fluorine
  77. The Carbon Dioxide in the atmosphere, by volume, is? 

  78. 03%
  79. Diamond is an allotropic form of? 

  80. Carbon
  81. The SI unit of Heat is? 

  82. Joule
  83. The gas, commonly known as “laughing gas”, is? 

  84. Nitrous Oxide
  85. The energy value of food is measured in? 

  86. Joule
  87. Water covers __________ of the Earth’s surface? 

  88. 70%
  89. The fourth state of matter is? 

  90. Plasma
  91. The device used to convert Alternate Current into Direct Current is called? 

  92. Rectifier
  93. The number of oscillations per second is called? 

  94. Frequency
  95. Sound waves from a loudspeaker are caused by? 

  96. Vibrations
  97. There are __________ methods of heat transfer? 

  98. 3
  99. The unit used to measure ‘magnetic flux’ is? 

  100. Weber
  101. The battery was invented by? 

  102. Volta
  103. The nearest planet to the Sun is? 

  104. Venus
  105. Bronze is an alloy of?

  106. Copper, Tin
  107. Neutrons were discovered by? 

  108. James Chadwick
  109. Nucleus was discovered by? 

  110. Rutherford
  111. Energy can be converted from one form to another, but all energy ends up as? 

  112. Heat energy
  113. A battery converts ________ into electrical energy? 

  114. Chemical energy
  115. Current is the flow of

  116. Electrons
  117. Electrons were discovered by? 

  118. Thomson
  119. Between the melting point and boiling point of a substance, the substance is a?

  120. Liquid
  121. The interior structure of the Earth is divided into ________ layers? 

  122. 5
  123. We live on the Earth’s? 

  124. Crust
  125. The thickest layer of the Earth is? 

  126. Mantle
  127. The Earth’s crust ranges from ________ km in depth.? 

  128. 5-70
  129. The anode is the electrode connected to the ________ terminal of a battery?

  130. Positive
  131. 1 tonne = ________ kg? 

  132. 1000
  133. The normal temperature of the body is? 

  134. 4 degree
  135. Weakest bone is? 

  136. clavicle bone
  137. Hardest bone is?

  138. collar bone
  139. The hardest part of the body is? 

  140. tooth
  141. Most abundant element in the human body is carbon? 

  142. Oxygen or calcium
  143. Systole is heart?

  144. contraction
  145. Eye is filled with ________ liquids?

  146. two
  147. The femur is the longest?

  148. bone
  149. Head or skull has?

  150. 29 bones
  151. Total bones are? 

  152. 206
  153. Universal donor group is___?

  154. O group
  155. Life span of red blood cells is? 

  156. 120 days.
  157. The Black Mamba is the fastest? 

  158. Snake
  159. New Zealand is close to Int? 

  160. Date Line.
  161. Temperature at earth’s core is?

  162. 2000 deg: C
  163. Sun is 400 times larger than the? 

  164. Moon
  165. When are you most likely to see a penumbra?

  166. During an Eclipse.
  167. A wind which reverses seasonally is? 

  168. Wind
  169. Oceans are on average?

  170. 4 km deep.
  171. Which electromagnetic wave has the shortest wavelength? 

  172. Gamma rays
  173. All electromagnetic waves have the same? 

  174. Speed in vacuum
  175. . The reflection of sound is called?

  176. Echo
  177. An instrument used to measure electric current is called? 

  178. Ammeter
  179. The SI unit of thermodynamic temperature is

  180. Kelvin
  181. The shortest distance between crest to crest is called? 

  182. Wavelength
  183. The speed of sound is fastest in? 

  184. Gasses
  185. The branch of science which study the interaction between matter and radian energy is called?

  186. Spectroscopy
  187. The horizontal rows of the periodic table are called? 

  188. Periods
  189. The vertical columns of the periodic table are called? 

  190. Groups
  191. Which metallic element is liquid at room temperature? 

  192. Mercury
  193. Which non-metallic element is liquid at room temperature? 

  194. Bromine
  195. Battery charger converts electrical energy into ___energy? 

  196. Chemical
  197. A loudspeaker changes ________ energy into sound energy? 

  198. Electrical.
  199. The strongest part(s) of a magnet is/are? 

  200. North and south pole
  201. When gas is ionized, ________ forms. ? 

  202. Plasma
  203. Wind is caused by? 

  204. Difference in atmospheric pressure
  205. Wind speed is measured by? 

  206. Anemometer
  207. The fact that universe is expanding was discovered by? 

  208. Hubble
  209. X-rays were discovered by? 

  210. Roentgen
  211. The Nobel prize in physics for the discovery of the law of photoelectric effect was awarded to? 

  212. Einstein
  213. The symbol of gold is? 

  214. Au
  215. Plaster of Paris is produced by heating? 

  216. Gypsum
  217. Which from the following is NOT true about Helium gas? 

  218. Toxic
  219. Which is the largest excretory organ of the body?

  220. skin
  221. The brain is enclosed in a bony case called? 

  222. cranium
  223. Which is the bone that is present in forelimb?

  224. radius
  225. Which one is herbivore? 

  226. cow
  227. Which structure helps in transport of water in plants ? 

  228. xylem
  229. The organisms that can make their own food are called ? 

  230. producers
  231. Bacteria are ? 

  232. prokaryotes
  233. Bile juice is secreted by? 

  234. gall bladder
  235. DNA structure was first described by? 

  236. Watson and Crick
  237. Pollination is best defined as the transfer of pollen from an anther to

  238. stigma
  239. Movement of the cell against concentration gradient is called ?

  240. active transport.
  241. One of the following is not a function of bones protein ? 

  242. synthesis
  243. Plants absorb most part of water needed by them through their ? 

  244. root hairs
  245. Highly intelligent mammals are ? 

  246. dolphin
  247. Process of cell division take place by ____?

  248. mitosis
  249. Pulses are a good source of ?

  250. proteins
  251. Plants that grow in dry habitat are called ? 

  252. xerophytes
  253. The simplest amino acid is ? 

  254. glycine
  255. Accumulation of lipid molecules in brain cells lead to ? 

  256. mental retardation
  257. The life and activities of a cell is controlled by? 

  258. nucleus
  259. Flagella are composed of ? 

  260. microtubules
  261. Tobacco mosaic virus was crystallized by ? 

  262. Stanely
  263. Non-enveloped naked viruses are known as ?

  264. virions
  265. Gram +ve bacteria on treatment with crystal violet dye give colour? 

  266. purple
  267. Malarial parasite is injected into man as ? 

  268. sporozoites
  269. The terms procariotique and eucariotique were proposed by ? 

  270. Chatton
  271. The most common type of asexual reproduction in the fungi is? 

  272. spore production
  273. Outside the thallus of Marchantia there are special structures called ? 

  274. rhizoids
  275. The vascular plants are termed as?

  276. tracheophytes
  277. In human beings influenza is caused by? 

  278. virus
  279. In many which phylum the body of organisms is usually divided in?

  280. three regions
  281. called head, thorax, and abdomen? 

  282. arthropods
  283. Amoeba moves in water with the help of locomotory organs called ? 

  284. pseudopodia
  285. In all coelenterates, endoderm give rise to? 

  286. digestive system
  287. Higher vascular plants are also called ? 

  288. seed plants
  289. The plants which produce embryo but lack vascular tissues and seeds are placed in ? 

  290. bryophytes
  291. Which bone is called beauty bone in women ?

  292. clavicle
  293. Detachment of myosin head and actin in rigor mortis occurs due to ? 

  294. autolysis in body
  295. Release of the ovum from the ovary is called? 

  296. ovulation
  297. The foetus is protected from the mechanical damage by the? 

  298. amniotic fluid
  299. Rich source of energy in seimen is? 

  300. glucose
  301. Sickle cell anemia was discovered by ? 

  302. Vernon Ingram
  303. Kangaroo has an abdominal pouch known as ? 

  304. marsupial
  305. The utilization of the products of digestion is called? 

  306. assimilation
  307. Parabronchi are present in ? 

  308. birds
  309. The respiratory problem most common in smokers is? 

  310. emphysema
  311. Water potential of pure water is? 

  312. zero
  313. Bean-shaped cells in plants are ? 

  314. guard cells
  315. The normal pH of human blood is ? 

  316. 4
  317. Shrinkage of protoplast due to exosmosis of water is? 

  318. plasmolysis
  319. Atherosclerosis is a major condition leading to? 

  320. heart attack
  321. Villi and microvilli increase ? 

  322. absorption
  323. Splitting of glucose relates to? 

  324. glycolysis
  325. Reptiles hibernate during? 

  326. winter
  327. Which of the following plants are called arthrophytes? 

  328. sphenopsids
  329. Radio carbon dating is used to find the age of? 

  330. Fossils
  331. Seismology is the science of ? 

  332. Earthquakes
  333. The source of solar energy is ? 

  334. Nuclear energy
  335. fan object is placed midway between two parallel plane mirrors facing each other, then the number of images that appear in mirrors is? 

  336. Infinite
  337. In a vacuum , What will be common among X rays visible light, radio waves ? 

  338. Amplitude
  339. Barometer is used to measure? 

  340. Atmospheric pressure
  341. If u use a microscope to watch smoke particles in still air, you will see them moving about all the time. This phenomenon is called? 

  342. Brownian movement
  343. The mass of a neutron is approximate? 

  344. Equal to the mass of a proton
  345. The spherical shape of raindrops is due to ? 

  346. Atmospheric friction of air
  347. Galvanometer is an instrument For measuring currents of small? 

  348. magnitude
  349. Which of the following has highest frequency? 

  350. Gamma rays
  351. Most important effect of moon on earth is that? 

  352. Gives light
  353. The term ” Meteor” is applied to an interplanetary body, After it enters the earth? 

  354. atmosphere
  355. Newton`s rings are Coloured rings observed around the point of contact of a ? 

  356. convex lens
  357. The heat received by earth from the sun is known as? 

  358. Solar radiation
  359. Constellation is Configuration of fixed stars? 

  360. resembling a figure
  361. Which of the following part of the atmosphere is nearest to the earth? 

  362. Troposphere
  363. To an astronaut in space sky looks ? 

  364. Black
  365. Water is heated in a kettle. The inside water is heated by convection. A person sitting near the fire receives heat by ?

  366. Convection
  367. A time can come when we will be able to design a machine which can go on working for ever without the expenditure of energy. Is it possible ?

  368. No
  369. Light year is a unit of ? 

  370. Distance
  371. Three elements needed for the healthy growth of plants are ? 

  372. N, P, K
  373. Copper can be converted into gold by ? 

  374. Artificial Radioactivity
  375. In winter an iron pipe feel colder than a wooden window, This is because wood is

  376. non-Conductor
  377. The echo (reflected sound) will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least 

  378. 56fft
  379. It is possible to recognize a person in the dark by simply hearing his unique voice . It is because of the? 

  380. pitch
  381. When a ray of sunlight enters a dark room, its straight path becomes visible because of dust particles hanging in the air. It is because the light is? 

  382. Visible
  383. A six feet tall lady wants to see her full image in a plane mirror. The minimum length of the mirror will be? 

  384. 3 feet
  385. The principle used in radar is the same as that of Sonar. In radar we use radio waves whereas in sonar we use? 

  386. Ultrasonic
  387. a fission nuclear reaction, a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called ? 

  388. Fusion nuclear reaction
  389. Parsec is a unit of ? 

  390. Distance
  391. German Silver is an alloy of ? 

  392. Cu + Ni
  393. The Continent Antarctica lies at the? 

  394. South pole
  395. The temperature of the dead body is?

  396. the temperature of the place where it is kept
  397. Lactometer is a type of Hydrometer which is used to measure the specific gravity of ?

  398. Milk
  399. The deepest place on earth is ? 

  400. Mariana Trench
  401. Twinkling of stars is caused by ? 

  402. refraction of light
  403. Magnifying power of a simple microscope can be increased by 

  404. the increasing focal length of the lens
  405. What is the approxiate mean distance that separates the sun from the earth? 

  406. 1480,00,000 km
  407. The outer surface of the sun is called ? 

  408. Photosphere
  409. Which planet has the maximum number of satellites? 

  410. Jupiter
  411. What is a light year? 

  412. The distance traveled by light in 1 year.
  413. What are asteroids? 

  414. Very small planet revolving around the sun
  415. What is the temperature at the center of the sun?

  416. 20 million k
  417. The phase of the moon are partially the result of the? 

  418. Revolution of the moon about the earth
  419. Constellations referred to as Zodiac are ? 

  420. Imaginary region that encompasses the path of the planets
  421. The height of a geostationary satellite from the surface of the earth is about ? 

  422. 3600 km
  423. What are the three basic units of measurement for the metric system? 

  424. Metre, liter and gram
  425. Clocks, which moves with the velocities comparable with the velocity of light, run? 

  426. with zero velocity
  427. When a gas turns into a liquid, the process is called? 

  428. condensation
  429. Electric current is measured by ?

  430. Ammeter
  431. Dim-vision in the evening and night results from the deficiency of which one of the following? 

  432. Vitamin A
  433. Diffusion of light in the atmosphere takes place due to ? 

  434. Dust particles
  435. Dental caries are due to 

  436. Bacterial infection
  437. The process of digestion begins in? 

  438. mouth 
  439. The planet nearest to sun is ? 

  440. Mercury
  441. Blood cells are manufactured by _________of the body? 

  442. bone marrow
  443. If an object gives off its own light, it is said to be? 

  444. luminous
  445. An electric heater would be most likely to produce? 

  446. R Radiations
  447. The Kelvin scale of temperature is called the? 

  448. absolute scale.
  449. The type of radiation that is unaffected by the magnetic field is called? 

  450. Gamma Rays.
  451. In a normal resting man, the rate of heart beat is? 

  452. 72 per minute.
  453. The brightest planet is ? 

  454. Venus.
  455. Gas in children‘s play-balloons going upward is? 

  456. hydrogen.
  457. A study of the chemical composition of the earth‘s crust is called?

  458. Geology
  459. In a heat engine heat energy is changed into ? 

  460. Mechanical Energy
  461. Frequency of audible sound is ? 

  462. 20-20KHz.
  463. Cheapest source of producing electricity is? 

  464. Wind and Solar
  465. The smallest unit of measurement of wavelength is? 

  466. nanometers(10^-9 m)
  467. Unit of electricity ―?

  468. Kilowatt Hour
  469. Excessive burning of fossil fuels causes? 

  470. acid rains.
  471. Newton is the unit of ? 

  472. Force
  473. Richter scale measures the severity of? 

  474. Earthquake
  475. Planet Mars has two? 

  476. Moon
  477. Our eye is very sensitive to?

  478.  blue light
  479. Astronomers cannot be nominated for the? 

  480. Noble Prize.
  481. Modern Bicycle was invented? 

  482. by Staley.
  483. Coulomb is the unit of?

  484. Electric Charge.
  485. The fat content in buffalo milk is? 

  486. 10%
  487. The major component of honey is? 

  488. Glucose.
  489. Severe deficiency of Vitamin D results in? 

  490. rickets
  491. Digestion of food is completed in the? 

  492. small intestine
  493. Wind energy is the _____energy

  494. Kinetic
  495. One of the countries through which equator passes is____? 

  496. Kenya
  497. A person with the following blood group are considered to be a universal recipient

  498. AB+
  499. The name of the common mineral salt present in sweat is?

  500. Sodium Chloride
  501. Role of biotechnology in the production of food based on_____? 

  502. Fermentation
  503. The hygrometer is used for measuring the? 

  504. Humidity of air
  505. The chemical name of vinegar is? 

  506. Dilute acetic acid
  507. The orbital period of the planet Mercury around the sun is? 

  508. 88 days
  509. Television signals are converted into light signals by?

  510. Photodiode
  511. The number of spark plugs needed in a diesel engine is? 

  512. 0
  513. The half-life of a radioactive element is 8-days. How long it takes to reduce it from 10 mg to 5 mg? 

  514. 8 days
  515. In humans, most nutrient molecules are absorbed by the? 

  516. stomach
  517. Sedimentary rocks are? 

  518. Porous
  519. Oasis is associated with? 

  520. Desert
  521. The Continent Antarctica lies at the__________? 

  522. South pole
  523. When a ray of sunlight enters a dark room, its straight path becomes visible because of dust particles hanging in the air. It is because light is_________? 

  524. Visible
  525. The temperature of the dead body is_______________? 

  526. Temperature of the place where it is kept
  527. A six feet tall lady wants to see her full image in a plane mirror. The minimum length of the mirror will be? 

  528. 3feet
  529. The principle used in radar is the same as that of Sonar. In radar, we use radio waves; whereas in sonar we use? 

  530. Ultrasonic
  531. The deepest place on earth is____________? 

  532. Mariana Trench
  533. A body can escape the gravitational pull of the earth if it is thrown up with a velocity of? 

  534. 7 miles per sec
  535. Night vision is possible with the help of___________? 

  536. Infrared Rays
  537. Tibia is a bone found in the____________? 

  538. Leg
  539. What is the main component of bones and teeth? 

  540. Calcium phosphate
  541. Which gland in the human body is called the master gland? 

  542. Pituitary
  543. The main constituent of hemoglobinis___________? 

  544. Iron
  545. Which is the largest organ in the human body? 

  546. Skin
  547. Medulla oblongata is a part of human ___________? 

  548. Brain
  549. Water has maximum density at____________? 

  550. 4°C
  551. The theory of Expanding Universe was first propounded by______?

  552. Hubble
  553. The biggest species of the cat family is___________?

  554. Tiger
  555. Which group of animals hasheterogametic females? 

  556. Domestic fowl
  557. Who proposed this concept “All motion is relative”? 

  558. Albert Einstein
  559. Which month of the calendar year can lack a new moon? 

  560. February
  561. The sunlight can reach a depth of___________meters in the ocean?

  562. 100
  563. Geiger-Muller counter is used to detect__________?

  564. Protons
  565. The autonomic nervous system innervate all of these except

  566. Skeletal muscles
  567. Vacuum tubes have been replaced by__________? 

  568. Transistors
  569. The number of electrons of a neutral atom is automatically known if one knows the

  570. Atomic number
  571. _________ is anything that takes up space and has mass.? 

  572. Matter
  573. What are considered the building blocks of matter? 

  574. Atoms
  575. The protons and neutrons are found in the center of the atom, which is called the ___of the atom? 

  576. Nucleus
  577. The speed of light is __________?

  578. 300,000 km/s
  579. The term ‘Computer’ is derived from__________?

  580. Latin
  581. Who is the father of Computer? 

  582. Charles Babbage
  583. Who is the father of the Internet? 

  584. Vint Cerf
  585. If a computer has more than one processor then it is known as__________?

  586. Multiprocessor
  587. The brain of any computer system is___________?

  588. CPU
  589. The computer that process both analog and digital is called_____?

  590. Hybrid computer
  591. ALU is____________? 

  592. Arithmetic Logic Unit
  593. RAM Stands for _____? 

  594. Random Access Memory
  595. Software is ______? 

  596. Untouchable Part

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