IIT JEE Practice Question and Answer

Q: A man sell 35 waffers for Rs. 15 each and loses Rs. 40.4. If he sells 35 waffers for Rs. 18, how much does he loss or gain ? 1694 1

  • 1
    Rs. 64
    Correct
    Wrong
  • 2
    Rs. 52
    Correct
    Wrong
  • 3
    Rs. 72
    Correct
    Wrong
  • 4
    Rs. 55
    Correct
    Wrong
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Answer : 1. "Rs. 64"
Explanation :

Answer: A) Rs. 64 Explanation: Given Loss = Rs. 40.4We know loss = cost price - selling price 40.4 = CP - 35(15)=> CP = 40.4 + 525=> CP = Rs. 565.4Now the New selling price of waffer is Rs. 18=> SP = 35(18) = 630Now Gain = SP - CP = 630 -565.4 = Rs. 64.6.

Q: World Soil Day is celebrated on ? 1693 0

  • 1
    July 26
    Correct
    Wrong
  • 2
    June 30
    Correct
    Wrong
  • 3
    August 9
    Correct
    Wrong
  • 4
    December 5
    Correct
    Wrong
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Answer : 4. "December 5"
Explanation :

Answer: D) December 5 Explanation:

Q: Guess the Number which satisfies the Logic behind  ? 1693 0

  • 1
    7
    Correct
    Wrong
  • 2
    14
    Correct
    Wrong
  • 3
    10
    Correct
    Wrong
  • 4
    19
    Correct
    Wrong
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Answer : 3. "10"
Explanation :

Answer: C) 10 Explanation: Adding the corresponding numbers in first and last figures gives the corresponding number in the middle figure. i.e, 4 + 3 = 7 13 + 2 = 15 2 + 4 = 6 9 + 1 = 10

Q: Which of these is a receptor molecule? 1693 0

  • 1
    A
    Correct
    Wrong
  • 2
    B
    Correct
    Wrong
  • 3
    C
    Correct
    Wrong
  • 4
    E
    Correct
    Wrong
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Answer : 2. "B"
Explanation :

Answer: B) B Explanation: The receptor molecules, which receive signals from outside the cell, passing the signal to the inside.   In order for a nerve cell, or any cell, to perceive its environment, it needs a sensory apparatus. And for an individual cell, most of that sensation is derived at the cell surface. So, it expresses on its cell surface proteins that span across the membrane. In the outside world, these proteins can act to receive signals, catching molecules on the outside and then as the molecule passes to the inside of the cell, they can send signals like alarm signals that can tell the cell that a particular molecule is outside.   Hence, here B is the receptor cell.

Q: Joel travels the first 3 hours of his journey at 60 mph speed and the remaining 5 hours at 24 mph speed. What is the average speed of Joel's travel in kmph ? 1692 0

  • 1
    38 kmph
    Correct
    Wrong
  • 2
    40 kmph
    Correct
    Wrong
  • 3
    60 kmph
    Correct
    Wrong
  • 4
    54 kmph
    Correct
    Wrong
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Answer : 3. "60 kmph"
Explanation :

Answer: C) 60 kmph Explanation: Average speed = Total distance / Total time. Total distance traveled by Joel = Distance covered in the first 3 hours + Distance covered in the next 5 hours. Distance covered in the first 3 hours = 3 x 60 = 180 milesDistance covered in the next 5 hours = 5 x 24 = 120 miles Therefore, total distance traveled = 180 + 120 = 300 miles. Total time taken = 3 + 5 = 8 hours. Average speed = 300/8 = 37.5 mph. we know that 1 mile = 1.6 kms => 37.5 miles = 37.5 x 1.6 = 60 kms Average speed in Kmph = 60 kmph.

Q: Which nation plans to build the first city on Mars by 2117 ? 1692 0

  • 1
    India
    Correct
    Wrong
  • 2
    United Arab Emirates
    Correct
    Wrong
  • 3
    China
    Correct
    Wrong
  • 4
    Russia
    Correct
    Wrong
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Answer : 2. "United Arab Emirates"
Explanation :

Answer: B) United Arab Emirates Explanation: The President and Vice-President of United Arab Emirates Sheik Mohamed bin Zayed Al Nahyan and Shaik Mohammed bin Rashid Al Maktoum announced in Febraury 2017 that they are planning to build the first inhabitable human settlement on Mars by 2117.

Q: What type of macromolecule is an enzyme? 1692 0

  • 1
    Proteins
    Correct
    Wrong
  • 2
    Saturated fats
    Correct
    Wrong
  • 3
    Phospholipids
    Correct
    Wrong
  • 4
    Lipids
    Correct
    Wrong
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Answer : 1. "Proteins"
Explanation :

Answer: A) Proteins Explanation: Enzymes are protein macromolecules. Enzymes are almost always made of proteins only. Proteins are large biopolymer molecules that are made up of repeating monomer units called amino acids. There are 20 different common amino acids that make up proteins like enzymes. Of these, nine amino acids are essential, which means you must get them from your diet. Enzymes catalyze chemical reactions in biological systems. This means that they speed up the rate of the reaction.

Q: Poor people have it. Rich people need it. If you eat it you die.   What is it? 1692 0

  • 1
    Money
    Correct
    Wrong
  • 2
    Brain
    Correct
    Wrong
  • 3
    Luxury items
    Correct
    Wrong
  • 4
    Nothing
    Correct
    Wrong
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Answer : 4. "Nothing"
Explanation :

Answer: D) Nothing Explanation: Poor people have Nothing Rich people need Nothing If you eat Nothing you die.   Hence, it is Nothing.

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