IIT JEE Practice Question and Answer

Q: 18 as a decimal? 1521 0

  • 1
    0.375
    Correct
    Wrong
  • 2
    0.247
    Correct
    Wrong
  • 3
    0.214
    Correct
    Wrong
  • 4
    0.125
    Correct
    Wrong
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Answer : 4. "0.125"
Explanation :

Answer: D) 0.125 Explanation: Here  18 in decimal means 8th part in 1. We know that 110 = 0.1 Then,   18 = ? => ? = 18 x 0.1110= 0.1 x 108= 0.5418= 0.125

Q: Nucleoli are present during 1476 0

  • 1
    prophase
    Correct
    Wrong
  • 2
    anaphase
    Correct
    Wrong
  • 3
    interphase
    Correct
    Wrong
  • 4
    prometaphase
    Correct
    Wrong
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Answer : 3. "interphase"
Explanation :

Answer: C) interphase Explanation: Nucleoli are present during Interphase. Chromosomes become visible during Prophase. Centromeres divide and sister chromatids become full-fledged chromosomes during Anaphase. Spindle fibers attach to kinetochores during Prometaphase.

Q: Find the Odd One Out? 3, 4, 14, 48, 576, 27648 1884 0

  • 1
    4
    Correct
    Wrong
  • 2
    14
    Correct
    Wrong
  • 3
    48
    Correct
    Wrong
  • 4
    27648
    Correct
    Wrong
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Answer : 2. "14"
Explanation :

Answer: B) 14 Explanation: Given Number series is :   3   4   14   48   576   27648   It follows a pattern that,   3   4   4 x 3 = 12   but not 14   12 x 4 = 48   48 x 12 = 576   576 x 48 = 27648       Hence, the odd one in the given Number Series is 14.

Q: Mirage is an example of 1849 0

  • 1
    Reflection of light & Refraction of light
    Correct
    Wrong
  • 2
    Dispersion of light
    Correct
    Wrong
  • 3
    Total Internal Reflection
    Correct
    Wrong
  • 4
    Refraction of light & Total Internal Reflection of light
    Correct
    Wrong
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Answer : 4. "Refraction of light & Total Internal Reflection of light"
Explanation :

Answer: D) Refraction of light & Total Internal Reflection of light Explanation: A Mirage is a naturally occurring optical phenomenon in which light rays bend to produce a displaced image of distant objects or the sky. It is caused due to Total internal Reflection. It is an optical illusion observed in deserts or hot summer days due to which a person sees a pond of water some distance ahead of him in which the surrounding objects appear inverted. How Mirage Forms:: 1. The temperature of other layers of atmosphere goes on decreasing as we go up.2. Therefore density and refractive index of air changes as one goes up.3. Thus a ray of light,gets refracted more and more away from the normal.4. At a particular angle when a ray of light exceeds critical angle, total internal reflection takes place and ray of light gets reflected in the same medium.5. when the reflected ray reaches our eye, it appears as coming from tree or sky .6. Hence the inverted image of tree creates an impression from a pond of water.

Q: A sum of Rs. 4,300 is distributed among M, N and O, such that M receives 25% more than N and N receives 25% less than O. What is O’s share in the amount? 1324 0

  • 1
    1564
    Correct
    Wrong
  • 2
    1600
    Correct
    Wrong
  • 3
    1632
    Correct
    Wrong
  • 4
    1714
    Correct
    Wrong
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Answer : 2. "1600"
Explanation :

Answer: B) 1600 Explanation: Let O's share = Rs. P => N's share = 75100 x P = 3P4 M's share = 54 x 3P4 = 15P16 15P16 + 3P4 + P = 4300=> P = 4300 x 1643 = 1600

Q: Which statement fits the Frontier Ethic? 2010 1

  • 1
    Recycle plastic
    Correct
    Wrong
  • 2
    Help those in need
    Correct
    Wrong
  • 3
    He who has more toys wins
    Correct
    Wrong
  • 4
    Walk lightly on Earth
    Correct
    Wrong
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Answer : 3. "He who has more toys wins"
Explanation :

Answer: C) He who has more toys wins Explanation: Frontier Ethic is Spending Earth's assets at the cost of losing resource capital. A frontier ethic assumes that the earth has an unlimited supply of resources. It is the notion of disregarding the Earth for the benefit or gain of man. If resources run out in one area, more can be found elsewhere or alternatively human ingenuity will find substitutes. This attitude sees humans as masters who manage the planet. It is completely Anthropocentric.

Q: Which Word Does Not Belong with the Others 5406 0

  • 1
    VDU
    Correct
    Wrong
  • 2
    Speakers
    Correct
    Wrong
  • 3
    Plotter
    Correct
    Wrong
  • 4
    Joystick
    Correct
    Wrong
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Answer : 4. "Joystick"
Explanation :

Answer: D) Joystick Explanation: Here Joystick is the word doesn't belong with the others. Because Except Joystick all others are Output Devices whereas Joystick is Input Device. VDU - Visual Display Unit - Monitor to display Speakers - Output sound Plotter - used to produce single or multiple colored images.

Q: 74.99% of 1299 + 8.98% of 1899 = ? 1667 0

  • 1
    1378
    Correct
    Wrong
  • 2
    1301
    Correct
    Wrong
  • 3
    1212
    Correct
    Wrong
  • 4
    1197
    Correct
    Wrong
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Answer : 3. "1212"
Explanation :

Answer: C) 1212 Explanation: 74.99% of 1299 + 8.98% of 1899 = ?  ? = 75 x 1400100 + 9 x 1800100 ? = 1050 + 162? = 1212.

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