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361-390: MCQs for General Science for Govt. Exams (UPSC and SSC)
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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
my email Id prasannabadseth18@gmail.com Wp No 8763701701
In Q364, why the planets are arranged in ascending order, when they specifically asked to arrange in the descending order?
triton is of Neptune
Ys
Sir, which is the planet with longest orbital period? Pluto or Neptune since Pluto is not a planet anymore
T
sir ur mcqs are superb.. can you please provide 9th snd 10 th also
Q.No 374 and 376 are conflicting... In 374, you said Triton is planet of neptune and 376 you matched it to Uranus... and actually it is planet of Neptune....
Yes!..You are right. There was a typing mistake in question no Q376.
Roobitha Masanam
3 years ago
Triton is the planet of Meptune
1. Q361. Select the planets from the following list: 1. Mercury 2. Pluto 3. Orion 4. Jupiter 5. Rigel Select the correct answer using the code given below: A. 1, 2, 3 and 4 only B. 1, 2 and 4 only C. 1 and 4 only D. All of the above

2. Solution: C Pluto is a dwarf planet. Orion is a constellation. Rigel is a star in Orion.

3. Q362. Which of the following is/are the prime criteria(s) for NOT considering Pluto a planet? 1. It is very small in size. 2. It has no moon. 3. Its orbit around sun is not uniform. Select the correct answer using the code given below A. B. C. D. 1 and 2 only 2 and 3 only All of the above None of the above

4. Solution: D The prime criterion of Pluto not being considered as a planet is that "It does not clears the neighbourhood". clearing the neighbourhood is one of the three criteria adopted by the International Astronomical Union (IAU) in its 2006 definition of a planet.

5. Q363. Which of the following planet(s) have no moon? 1. Venus 2. Mercury 3. Pluto 4. Neptune Select the correct answer using the code given below: A. 1, 2 and 3 only B. 1 and 2 only C. 2 and 3 only D. 3 and 4 only

6. Solution: B Venus and mercury have no moon.

7. Q364. Arrange the following planets in descending order on the basis of their average distance from the Sun? 1. Earth 2. Venus 3. Mercury 4. Mars 5. Jupiter Select the correct answer using the code given below A. 3-1-4-2-5 B. 3-2-1-4-5 C. 2-3-1-5-4 D. 4-1-3-2-5

8. Solution: B Self explanatory

9. Q365. As per International astronomical union(IAU), a planet is a celestial body which is? 1. Orbiting around the sun. 2. Has enough mass to remain in hydrostatic equilibrium. 3. Has at least one moon. 4. Has "cleared the neighborhood" around its orbit. Select the correct answer using the code given below: A. 1, 3 and 4 B. 1, 2 and 4 C. 2, 3 and 4 D. 1, 2 and 3

10. Solution: B The definition of a planet set in Prague, Czech Republic, in August 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a celestial body which: 1. Is in orbit around the Sun, 2. Has sufficient mass to assume hydrostatic equilibrium (a nearly round shape), and 3. Has "cleared the neighborhood" around its orbit. Having a moon is not a criterion to define a planet, Venus and mercury have no moon, still they are considered as planets.

11. Q366. A dwarf planet is a celestial body which is? 1. Orbiting around the sun. 2. Has very small mass and irregular shape. 3. Maintains the hydrostatic equilibrium 4. A dominant gravitational force in its neighborhoods. 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, 2 and 3 only

12. Solution: B out of three criteria discussed in previous Solution, the dwarf planet follows only upper two criteria

13. Solution: A OIn the end stages of planet formation, a planet (as so defined) will have "cleared the neighbourhood" of its own orbital zone, meaning it has become gravitationally dominant,and there are no other bodies of comparable size other than its satellites or those otherwise under its gravitational influence. A large body that meets the other criteria for a planet but has not cleared its neighbourhood is classified as a dwarf planet. This includes Pluto, which is constrained in its orbit by the gravity of Neptune and shares its orbital neighbourhood with Kuiper belt objects(KBOs)

14. Q369. Consider the following statements about Venus: 1. Venus has no moon. 2. It rotates in the opposite direction of earth's rotation. 3. The greenhouse effect is very strong on the Venus. 4. It is the brightest object before the dawn except sun. Select the correct answer using the code given below: A. 1, 2 and 3 B. 2, 3 and 4 C. 1, 3 and 4 D. All of the above

15. Solution: C Mars has two small moons, called Phobos and Deimos. Mars has four earth like seasons due to it's tilt on its axis Mars is home to the highest known mountain in the Solar System, Olympus Mons. Its height is about 22 Km, which is 3 times higher then Mount Everest

16. ts about Jupiter Q371. Consider the following statements about Jupiter: 1. Jupiter is the largest planet on the solar system. 2. It has largest number of natural satellites in our solar system 3. The name of its biggest moon is Ganymede. 4. Jupiter has planetary rings. Select the correct answer using the code given below: A. 1, 2 and 3 only B. 1, 2 and 4 only C. 1, 3 and 4 only D. All of the above

17. Solution: D Jupiter has 67 moons which are highest in the solar system. It is a Gas giant, all the planets after Jupiter are Gas giants. Its two moons, Ganymede and Europa are important. Europa is considered most suitable to have life.

18. Q373. Consider the following statements about Uranus: 1. The rotational axis of Uranus is most tilted in the solar system. 2. It rotates East to west. 3. Its orbital period is 50 years 4. It is also known as "Ice giant". Select the correct answer using the code given below: A. 1, 2 and 3 only B. 1, 2 and 4 only C. 2, 3 and 4 only D. All of the above

19. Q374. Consider the following statements about Neptune: 1. Triton is its largest moon. 2. Its orbital period is 165 years. 3. It provides stability to the Pluto 4. Voyager 2, a space probe launch by the European space agency has reached the is its largest moon Neptune. Select the correct answer using the code given below: A. 1, 2 and 3 B. 1, 2 and 4 C. 2, 3 and 4 D. All of the above

20. Q375. Consider the following statements about Pluto: 1. New horizon spacecraft is the first to flyby Pluto. 2. It has 5 moons, Charon is it's largest moon 3. It is not a Planet. 4. It's orbital period is longest in solar system. Select the correct answer using the code given below: A. 1, 3 and 4 only B. 3 and 4 only C. 1, 2 and 4 only D. All of the above

21. Solution: D Self explanatory

22. 0376. Match the following Moons with the planets they are orbiting: Moons a) Charon b) Triton c) Titan d) Ganymede Select the correct answer using the code given below: Planets 1. Jupiter 2. Pluto 3. Saturn 4. Uranus a) b) c) d) 2 1 34 A. B. C. 2 4 3 1 D. 3 2 1 4

23. Solution: C Self explanatory

24. Q378. Consider the following statements about asteroid belt: 1. It is a ring of large rocks and dust between the orbit of Jupiter and Uranus. 2. Ceres is a dwarf planet inside the asteroid belt. Select the correct answer using the code given below: A. 1 only B. 2 only C. 1 and 2 D. None

25. Solution: C Comets revolves around the sun in elliptical orbits. Short period comets come from the scattered disc and Kuiper belt Long period comets (which returns in more than 200 years) come from Oort cloud. Comets are mostly frozen object, but when they pass close to the Sun, they warm up and begin to release gasses, a process called Outgassing. This produces a visible atmosphere or coma and sometimes also a tail.

26. Q381. Consider the following statements 1. Meteors are an object that occasionally enter the earth's atmosphere. 2. Due to its high speed and high atmospheric friction it heats up, glows and evaporates very quickly. Some large meteors which reach the earth before evaporating completely are known as Meteorites. 3. Select the correct answer using the code given below: A. 1 and 2 only B. 1 and 3 only C. 2 and 3 only D. All of the above

27. Solution: D Self explanatory

28. Q384. The fibre which is least prone to catch fire is? A. Cotton B. Rayon C. Polyester D. Nylon

29. Solution: B Self explanatory

30. 0388. What happens ift Q388. What happens if water is cooled from room temperature to 0 C? A. Its volume decreases uniformly, becoming minimum at 0 C. B. Its volume increases uniformly, becoming maximum at 0 c. C. Its volume decreases upto 4 C and then increases. D. Its volume increases upto 4 C and then decreases.

31. Solution: D Self explanatory