Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Download
331-360: MCQs for General Science for Govt. Exams (UPSC and SSC)
7,015 plays

More
In this lesson, Dr. Roman Saini will discuss the MCQs related to various topics in General Science from Class 6 to Class 8 (Science) NCERT.

Roman Saini is teaching live on Unacademy Plus

Roman Saini
Part of a great founding team at Unacademy with Gaurav, Hemesh. Movies, Guitar, Books, Teaching.

U
Unacademy user
Hello subhodeep plss aap ek reply Karo mujhe ye smjh nhi aa raha ke aap Khan se ye bata raho Ho cz mere pass Hindu dekh rahi hun but usme... ye editorial nhi hai khin pe to ye kidhar se hein I mean kya mere pass Hindu pepar alag hai ya kya hai so mujhe smjh nhi aa raha plss help me and answer me...
Subhodeep Das
2 years ago
The Hindu k editoril page me hi hai ye.....watch it care fully
Can't find most of these in ncerts after question number 250
Cant find most of these in ncerts after 250
T
super, excellent , but most of the questions from biology, please add more physics and chemistry questions also
Matlab WOW questions , Thanks a ton sir . I fall short of words to praise you . I owe you sir .
q-339 isn't sun is the closest star to earth?
Lokesh Muniyal
3 years ago
YES!!
Karuna Kardam
a year ago
proxima centauri is the closest star to sun, not earth
  1. Q331. Consider the following facts: 1. A group of stars, usually in a recognizable shape or pattern is called constellation. 2. The boundaries of a constellation is laid down by International Astronomical union (IAU) 3. IAU is an association of professional astronomers under United Nations. 4. IAU is internationally recognized authority for assigning designations to celestial bodies. Select the correct answer using the code given below: A. 1, 2 and 3 only 8. 1, 2 and 4 only C. 1, 3 and 4 only D. 1 and 2 only


  2. Solution: B Reseh ounw The IAU was founded on July 28, 1919, at the Constitutive Assembly of the International Research Council (now International Council for Science) held in Brussels, Belgium lt's not a UN agency for scence) held in Brussels, Beleium


  3. Q332. With reference to constellations, consider the following statements: 1. There are 88 constellations recognized by IAU till date. 2. Orion is a well-known constellation that can be seen during winter in the early morning. 3. Orion is also known as Hunter. 4. Rigel is the brightest star in the Orion constellation Select the correct answer using the code given below: A. All of the above B. 1, 2 and 4 only C. 1,3 and 4 only D. 2, 3 and 4 only


  4. Solution: C Presently IAU identifies 88 constellations. Orion is also known as hunter, because of it makes hunter like recognisable pattern. It can be seen during winters in late evening. So statement 2 is wrong. It is made up of 8 bright stars, out of which 3 forms its belt. Rigel is the brightest and Betelgeuse is the biggest star in it.


  5. Q333. Consider the following statements about Pole star: 1. It remains in a fixed position throughout the course of the night and its is used in celestial navigation. 2. It is visible in throughout the world 3. This star can also be used in determining the latitude. 4. It is found in the Ursa major constellation. 5. It is closest to the celestial north pole. Select the correct answer using the code given below: A. 1, 2 and 3 only B. 1, 3 and 5 only C. 1, 4 and 5 only D. 1, 3, 4 and 5 only


  6. Solution: B Pole star is not visible from the southern hemisphere. It is located in Ursa minor constellation. Hence statement 2 and 4 are wrong


  7. Q334. With reference to Ursa Major constellation, consider the following statements: 1. It is a major constellation in northern celestial hemisphere. 2. It is most visible during winters in the early part of the night. 3. It is also known as Great Bear or Saptarishi. 4. There are 7 stars in this constellation Select the correct answer using the code given below: A. 1 and 2 only B. 1 and 3 only C. 1 and 4 only D. 1, 3 and 4 only


  8. Solution: B Although it remains visible throughout the year in most part of the northern hemisphere but lt is most visible during summers in the early part of the night. Ursa major although known as Saptarshi, does not have only 7 stars. In fact, every constellation has lot of tiny stars also but it is the bright stars which counts. It is because we carn see these stars from our naked eyes Go to the solution of question no 332 and notice, what I highlighted in fourth point. It is 8 bright stars. Note it, Instead of 8 stars I mentioned 8 bright stars. OLesson: Read between the lines, look for or discover a meaning that is implied along with what is explicitly stated.


  9. Q335. Match the following stars with their respective Constellation: List -I a) Rigel b) Schedar c) Sirius d) Vega Select the correct answer using the code given below List-ll 1. Lyra 2. Orion 3. Canis major 4. Cassiopeia a) b) c) d) A. 1 2 3 4 C. 2 4 3 1


  10. Solution: D Self explanatory


  11. Q336. Consider the following statements: 1. Sirius is the brightest star in the earth's night sky. 2. It is also known as 'Lion star' 3. It is larger than the Sun. Select the correct answer using the code given below A. 1, 2 and 3 only B. 1 and 2 only C. 1 and 3 only D. 1 only


  12. Solution: C Sirius is the brightest star in the earth's night sky and it is also known as Dog star. It is near to Orion constellation and located in Canis Major constellation.


  13. Solution: A OIn previous question, we saw that the brightest star in the earth's night sky is the Sirius. The most brightest night star along with their constellations are as follows(the ones in bold are important) Canis Major Sirius - Canopus- Alpha Centauri Centauras Arcturus - Vega - Capella- Rigel- Carina Bootes Lyra Auriga Orion


  14. Q339. Consider the following statements: 1. Proxima Centauri is the closest star to earth. 2. It is in the Centaurus constellation. 3. It is brighter than the Sun. Select the correct answer using the code given below A. B. C. D. 1 and 2 only 1 and 3 only 2 and 3 only All of the above


  15. Solution: C OIn statement 1, Rigel is a star not constellation


  16. Q341. Which of the following is the brightest star in the earth's sky? A. Sirius B. Sun C. Pole star D. Rigel


  17. Solution: B Did you guess Sirius?? Dear friend, there is the difference between the earth's sky and earth's night sky. Remember the lesson!


  18. Q343. Consider the following statements: 1. Lodestar is a dependable indicator of the direction towards the north pole. 2. The south celestial pole also has a bright star like Polaris to mark its position. This star is known as south star or Sigma Octantis. Select the correct answer using the code given below: A. 1 only B. 2 only C. 1 and 2 D. None


  19. 344. Which of the following ts/are true for ultrasound? Q344. Which of the following is/are true for ultrasound? 1. Sound of frequencies higher than 20kHz are called ultrasound. 2. Ultrasounds are able to travel along well defined paths even in the presence of obstacles. 3. Dolphins are capable of producing ultrasound 4. d is often used to clean parts located in hard to reach places. Select the correct answer using the code given below A. 1, 2 and 4 only B. 1, 2 and 3 only C. 2, 3 and 4 only D. All of the above


  20. 3 Wich of the ollowing isfare considered as a part Q345. Which of the following is/are considered as a part of the fungi kingdom? 1. Lichens 2. Penicillium 3. Mushrooms 4. Yeasts Select the correct answer using the code given below: A. 1 and 2 only B. 2 and 3 only C. 3 and 4 only D. All of the above


  21. Solution: D Self explanatory


  22. 46 Which of the following is/are true for Infrasound: 346. Which of the following is/are true for Infrasound: 1. Sound of frequencies below 20 Hz is called infrasound. 2. Elephants produce sound in the infrasound range. 3. Earthquakes also produce low frequency infrasound. Select the correct answer using the code given below: A. 1 only B. 1 and 2 only C. 1 and 3 only D. All of the above


  23. SOLUTION: D Explanation: All options are correct.


  24. Q348. Consider the following statements Assertion (A) An ageing star looks big and red Reason (R) Lower surface temperature due to less fuel shifts the star's visible light output to red Option: A. Both A and R are true and R is the correct explanation of A B, C. A is true but R is false. D. A is false but R is true. E. Both A and R are false.


  25. Solution: D Human faeces, animal waste and oil are organic impurities, usually in the form of tannic acid and its derivatives, are typically present in fine aggregates such as sand.


  26. Q351. Consider the following statements 1. For measuring higher temperatures like that in a furnace, instruments like bolometers are used 2. The colour at which a hot object gives off the maximum energy, is directly related to the temperature of the hot body. 3. The spectrum of sunlight is analysed by using special instruments called pyrometers. 4. The maximum intensity falls in the green part of the sun's spectrum. Select the correct answer using the code given below: A. All of the above B. 1, 2 and 3 C. 2 and 4 D. 1 and 4


  27. Solution: C The spectrum of sunlight is analysed by using special instruments called Bolometer. For measuring higher temperatures like that in a furnace, instruments like Pyrometers are used


  28. 354. The planet/planets on which the Sun rises in the west is/are? 1. Venus 2. Uranus 3. Mars 4. None Select the correct answer using the code given below: A. Only 4 B. 1 and 3 C. 2 and 3 D. 1 and 2


  29. Solution: C Self explanatory


  30. Q358. Planets do not twinkle because? A. They emit light continuously. B. They are luminous sources of light. C. They are nearer to us and therefore their light does not pass through the Tho atmosphere. D. They are nearer to us and therefore minor variations in their intensity are not noticeable.


  31. Solution: D Self explanatory