IIT JEE Practice Question and Answer

Q: Rifath Sharook has designed the world’s lightest satellite “KalamSat”. He hails from which country  ? 932 0

  • 1
    Russia
    Correct
    Wrong
  • 2
    Pakistan
    Correct
    Wrong
  • 3
    Dubai
    Correct
    Wrong
  • 4
    India
    Correct
    Wrong
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Answer : 4. "India"
Explanation :

Answer: D) India Explanation: Indian teen Rifath Sharook from Tamil Nadu has designed the world’s lightest & smallest satellite named “KalamSat”. The satellite weighs only 64 grams and will be launched by NASA on June 21, 2017. With this, he will become the first Indian student to have his experiment launched by NASA. The main role of the satellite will be to demonstrate the performance of 3-D printed carbon fibre. The satellite has been designed in a way which will have a 240-minute mission in space and will operate for 12 minutes in a micro-gravity environment of space.

Q: How can we get 24 as an answer by using 6, 11, 3 and 9? 932 0

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Answer :
Explanation :

This can be solved in two ways using only 6, 11, 9 and 3 we must get 24. 1. {[(11–6) x 3] + 9} By solving this we get 5 x 3 + 9 = 15 + 9 = 24.   2. [(9–6) x (11–3)] = 3 x 8 = 24.

Q: What part of the atom has a positive charge? 932 0

  • 1
    Neutron
    Correct
    Wrong
  • 2
    Proton
    Correct
    Wrong
  • 3
    Electron
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 2. "Proton"
Explanation :

Answer: B) Proton Explanation: Protons carry a positive electrical charge, electrons carry a negative electrical charge and neutrons carry no electrical charge at all. The protons and neutrons cluster together in the central part of the atom, called the nucleus, and the electrons 'orbit' the nucleus.

Q: 54, 60  LCM is 930 0

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    600
    Correct
    Wrong
  • 2
    540
    Correct
    Wrong
  • 3
    60
    Correct
    Wrong
  • 4
    54
    Correct
    Wrong
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Answer : 2. "540"
Explanation :

Answer: B) 540 Explanation: Here the LCM of 54, 60 is   => 2 x 3 x 3 x 3 x 10 = 6 x 9 x 10 = 54 x 10 = 540.

Q: The term 'fourth estate' is used in reference to 930 0

  • 1
    The Executive
    Correct
    Wrong
  • 2
    The Press and news paper
    Correct
    Wrong
  • 3
    Parliament
    Correct
    Wrong
  • 4
    The Judiciary
    Correct
    Wrong
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Answer : 2. "The Press and news paper"
Explanation :

Answer: B) The Press and news paper Explanation: Thomas Carlyle attributed the origin of the term to Edmund Burke, who used it in a parliamentary debate in 1787 on the opening up of press reporting of the House of Commons of Great Britain.

Q: Solve the Logical Puzzle ? 928 0

  • 1
    2
    Correct
    Wrong
  • 2
    4
    Correct
    Wrong
  • 3
    8
    Correct
    Wrong
  • 4
    0
    Correct
    Wrong
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Answer : 2. "4"
Explanation :

Answer: B) 4 Explanation:

Q: What has 4 Eyes But cannot see? 927 0

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Answer :
Explanation :

What has 4 Eyes But cannot see is Mississippi. The wording of Mississippi has 4 'i''s. But it can't see.

Q: O and O' are the center of the two circles with radii 7cm and 9cm respectively. The distance between the centers is 20cm. If PQ be the transverse common tangent to the circles, which cuts OO' at X, what is the length of O'X in cm ? 926 0

  • 1
    10
    Correct
    Wrong
  • 2
    6
    Correct
    Wrong
  • 3
    35/4
    Correct
    Wrong
  • 4
    45/4
    Correct
    Wrong
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Answer : 4. "45/4"
Explanation :

Answer: D) 45/4 Explanation: As clear from the figure itself, triangle OQX and triangle O'PX are similar. So, OQ/O'P = OX/O'X => OX = (7/9)xO'X And since, OX + O'X = 20 => (7/9)xO'X + O'X = 20 => O'X = 45/4

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