35. Which of the following planet has the largest number of satellites?
    (a) Jupiter
    (b) Saturn
    (c) Mars
    (d) Earth
Ans: (b)
36. The planet whose density is less than water and on keeping at the water surface it starts to float:
    (a) Mercury
    (b) Venus
    (c) Saturn
    (d) Mars
Ans: (c)
37. The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate
    explanation? [CSAT - IAS (Pre) 2011]
    1) There are no clouds or water vapour in the lower stratosphere.
    2) There is no vertical winds in the lower stratosphere
    Which of the statements given above is / are correct in this context?
    (a) 1 only
    (b) 2 only
    (c) Both 1 and 2
    (d) Neither 1 nor 2
Ans: (c)
38. The earth revolves around the sun in :
    (a) 365 days
    (b) 365.25 days
    (c) 372 days
    (d) 24 hrs
Ans: (c)
39. The shape of the sun is:
    (a) Round
    (b) Spherical
    (c) Oval
    (d) None of the above
Ans: (b)
40. Consider the following gases:
    1. Helium
    2. Hydrogen
    3. Oxygen
    Which of the above are the primary gases in the sun?
    (a)  1 only
    (b)  2 only
    (c)  1 and 2 only
    (d)  2 and 3 only
Ans: (c)
41. Which of the following is not a layer in the solar atmosphere?
    (a) Photosphere
    (b) Chromosphere
    (c) Corona
    (d) Ionosphere