IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: In what way does ocean water move globally? 3309 0

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    Along cold water currents from the equator to the poles.
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    Along warm water currents from the warmer regions to colder regions
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    Along warm water currents from the equator to the poles
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  • 4
    None of the above
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उत्तर : 3. "Along warm water currents from the equator to the poles"
व्याख्या :

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

प्र: Is B2+ Paramagnetic or Diamagnetic? 3306 0

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उत्तर :
व्याख्या :

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.

प्र: The wealthiest citizens of ancient rome were 3300 0

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    patricians
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    laborers
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    farmers
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    plebeians
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उत्तर : 1. "patricians"
व्याख्या :

Answer: A) patricians Explanation:

प्र: 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) 3296 0

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    F-F
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    Ca-F
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    H-F
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    Na-F
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उत्तर : 4. "Na-F"
व्याख्या :

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.

प्र: Sugar Bowl of the World? 3293 0

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    Cuba
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    Brazil
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    India
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    Australia
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उत्तर : 2. "Brazil"
व्याख्या :

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.

प्र: 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 ? 3291 0

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    He lost Rs. 200
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    He gained Rs. 200
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    Neither he gained nor lost
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    None of the above
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उत्तर : 4. "None of the above"
व्याख्या :

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.

प्र: Ayurveda Owes its Origin to 3288 0

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    Yajurveda
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    Atharvaveda
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    Rigveda
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    Samaveda
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उत्तर : 2. "Atharvaveda"
व्याख्या :

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.

प्र: 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

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    5.65
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    2.7
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    3.5
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    6.66
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उत्तर : 3. "3.5"
व्याख्या :

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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