IIT JEE Practice Question and Answer

Q: During which process is water produced? 2494 0

  • 1
    Acetyl COA formation
    Correct
    Wrong
  • 2
    Electron transport chain
    Correct
    Wrong
  • 3
    Alcohol fermentation
    Correct
    Wrong
  • 4
    citric acid cycle
    Correct
    Wrong
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Answer : 2. "Electron transport chain"
Explanation :

Answer: B) Electron transport chain Explanation:

Q: Which structural formula represents a dipole? 2493 0

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

Answer: D) 1 Explanation: What is Dipole :   when two atoms in a molecule have substantially different electronegativity: One atom attracts electrons more than another, becoming more negative, while the other atom becomes more positive.

Q: " Kamarupa " is the old name of ______ state ? 2492 0

  • 1
    Bihar
    Correct
    Wrong
  • 2
    Assam
    Correct
    Wrong
  • 3
    Bengal
    Correct
    Wrong
  • 4
    Odisha
    Correct
    Wrong
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Answer : 2. "Assam"
Explanation :

Answer: B) Assam Explanation: Alternately it is also called as Pragjyotisha before British rule.

Q: A motorboat can go 10 miles downstream on a river in 20 min. It takes 30 min for this boat to go back at the same 10 miles. Find the speed of the current ? 2491 0

  • 1
    8 m/h
    Correct
    Wrong
  • 2
    5 m/h
    Correct
    Wrong
  • 3
    7 m/h
    Correct
    Wrong
  • 4
    6 m/h
    Correct
    Wrong
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Answer : 2. "5 m/h"
Explanation :

Answer: B) 5 m/h Explanation: As the distance travelled is constant, the time taken is inversely proportional to speed. Let 'u' be the speed of the current and 'v' be the speed of the boat. Speed of the boat downstream = v + u & upstream = v - u => v+u/v-u = 30/20 => v/u = 5 => v = 5u => v + u = 6u = 10/20/60 miles/hr => 6u = 30 m/h => u = 5 m/h

Q: The difference between the time taken by two trains to travel a distance of 350 km is 2 hours 20 minutes. If the difference between their speeds is 5 km/hr, what is the speed of faster train ? 2491 0

  • 1
    36 kmph
    Correct
    Wrong
  • 2
    30 kmph
    Correct
    Wrong
  • 3
    34 kmph
    Correct
    Wrong
  • 4
    40 kmph
    Correct
    Wrong
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Answer : 2. "30 kmph"
Explanation :

Answer: B) 30 kmph Explanation: Let the speed of the faster train be 'S' kmph   Then speed of the slower train will be '(S-5)' kmph   Time taken by faster train = 350/S hrs   Time taken by slower train = 350/(S-5) hrs  350s-5 - 350s = 2 hrs 20 min = 213 = 73   => S = 30 km/hr.

Q: What group sets hunting regulations in most states? 2489 0

  • 1
    Forest management agency
    Correct
    Wrong
  • 2
    Head hunting firms agency
    Correct
    Wrong
  • 3
    Hunting outfitters agency
    Correct
    Wrong
  • 4
    A wildlife management agency
    Correct
    Wrong
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Answer : 4. "A wildlife management agency"
Explanation :

Answer: D) A wildlife management agency Explanation: A wildlife management agency sets hunting regulations in most states.     These agencies will have regular meetings where the public can voice their concerns and make suggestions. Hunters wishing to propose changes to the regulations should participate in these meetings or join a hunting organization that interacts with the agency.

Q: The reflex angle between the hands of a clock at 11:35 is ? 2489 0

  • 1
    137.5 degrees
    Correct
    Wrong
  • 2
    222.5 degrees
    Correct
    Wrong
  • 3
    192.5 degrees
    Correct
    Wrong
  • 4
    330 degrees
    Correct
    Wrong
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Answer : 2. "222.5 degrees"
Explanation :

Answer: B) 222.5 degrees Explanation: Apply the formula for finding the angle:Angle=(30h-(11/2)m( where m stands for minutes and h stands for hours)Hence, 30x11 - 11/2x35 = 330 - 192.5 = 137.5 degreesThe reflex angle = 360 - 192.5 degree = 222.5 degrees.

Q: The third proportional to 9 and 12 is ? 2488 0

  • 1
    14
    Correct
    Wrong
  • 2
    16
    Correct
    Wrong
  • 3
    18
    Correct
    Wrong
  • 4
    20
    Correct
    Wrong
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Answer : 2. "16"
Explanation :

Answer: B) 16 Explanation: Let the third proportion to 9 & 12 be 'x'. => 9:12 = 12 :p => p = 12x12/9 = 16.

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