IIT JEE Practice Question and Answer

Q: In what way does ocean water move globally? 3306 0

  • 1
    Along cold water currents from the equator to the poles.
    Correct
    Wrong
  • 2
    Along warm water currents from the warmer regions to colder regions
    Correct
    Wrong
  • 3
    Along warm water currents from the equator to the poles
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 3. "Along warm water currents from the equator to the poles"
Explanation :

Answer: C) Along warm water currents from the equator to the poles Explanation:

Q: Is B2+ Paramagnetic or Diamagnetic? 3305 0

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Answer :
Explanation :

B2+ is a Paramagnetic.  The filled orbitals are σ(1s)22, σ∗(1s)22, σ(2s)22, σ∗(2s)22. The half-filled orbitals are π(2pxx) and π(2pyy). Since it posses 2 unpaired electrons, it is Paramagnetic in nature.

Q: The wealthiest citizens of ancient rome were 3299 0

  • 1
    patricians
    Correct
    Wrong
  • 2
    laborers
    Correct
    Wrong
  • 3
    farmers
    Correct
    Wrong
  • 4
    plebeians
    Correct
    Wrong
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Answer : 1. "patricians"
Explanation :

Answer: A) patricians Explanation:

Q: Which pair of atoms has the highest electronegativity difference?   (Calcium's electronegativity is 1.0 Fluorine's electronegativity is 4.0 Hydrogen's electronegativity is 2.2 Sodium's electronegativity is 0.93) 3295 0

  • 1
    F-F
    Correct
    Wrong
  • 2
    Ca-F
    Correct
    Wrong
  • 3
    H-F
    Correct
    Wrong
  • 4
    Na-F
    Correct
    Wrong
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Answer : 4. "Na-F"
Explanation :

Answer: D) Na-F Explanation: F-F = 4 - 4 = 0 Ca-F = 4 - 1 = 3.0 H-F = 4 - 2.2 = 1.8 Na-F = 4 - 0.93 = 3.07   Hence, the highest electronegativity difference is in Na-F.

Q: Sugar Bowl of the World? 3292 0

  • 1
    Cuba
    Correct
    Wrong
  • 2
    Brazil
    Correct
    Wrong
  • 3
    India
    Correct
    Wrong
  • 4
    Australia
    Correct
    Wrong
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Answer : 2. "Brazil"
Explanation :

Answer: B) Brazil Explanation: "Cuba" is the name of the country which was commonly known as the "Sugar Bowl of the World". It is called by this name because formerly it was the largest producer of Sugar, but now Brazil is currently the largest producer of Sugar. It is an island country in the Caribbean and is officially called as the Republic of Cuba.

Q: A person sold two cows each for Rs.9900. If he gained 10% on one and lost 20% on the other, then which of the following is true ? 3288 0

  • 1
    He lost Rs. 200
    Correct
    Wrong
  • 2
    He gained Rs. 200
    Correct
    Wrong
  • 3
    Neither he gained nor lost
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 4. "None of the above"
Explanation :

Answer: D) None of the above Explanation: In first he got Rs. 990 But in second he lost Rs. 1980 So he lost Rs. 990.

Q: Ayurveda Owes its Origin to 3285 0

  • 1
    Yajurveda
    Correct
    Wrong
  • 2
    Atharvaveda
    Correct
    Wrong
  • 3
    Rigveda
    Correct
    Wrong
  • 4
    Samaveda
    Correct
    Wrong
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Answer : 2. "Atharvaveda"
Explanation :

Answer: B) Atharvaveda Explanation: Ayurveda Owes its Origin to Atharvaveda.   The early history of ayurveda asserts that around 1500 BC, ayurveda's fundamental and applied principles got organised and enunciated. In this historical construction, Ayurveda traces its origins to the Vedas, Atharvaveda in particular, and is connected to Hindu religion. Atharvaveda (one of the four most ancient books of Indian knowledge, wisdom and culture) contains 114 hymns or formulations for the treatment of diseases. Ayurveda originated in and developed from these hymns. In this sense, ayurveda is considered by some to have divine origin. Indian medicine has a long history, and is one of the oldest organised systems of medicine. Its earliest concepts are set out in the sacred writings called the Vedas, especially in the metrical passages of the Atharvaveda.

Q: If (89)2 is added to the square of a number, the answer so obtained is 16202. What is the (1/26) of that number? 3282 0

  • 1
    5.65
    Correct
    Wrong
  • 2
    2.7
    Correct
    Wrong
  • 3
    3.5
    Correct
    Wrong
  • 4
    6.66
    Correct
    Wrong
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Answer : 3. "3.5"
Explanation :

Answer: C) 3.5 Explanation: Let the number is = x (89)2 + x2 = 16202 x2 = 8281 x = 91 => (1/26) of 91 = 3.5

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