IIT JEE Practice Question and Answer

Q: 3 divided by 1/3? 1136 0

  • 1
    1
    Correct
    Wrong
  • 2
    0
    Correct
    Wrong
  • 3
    9
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 3. "9"
Explanation :

Answer: C) 9 Explanation: 3 divided by 1/3 => 313 = 3 x 3/1  = 9

Q: Plants that grow in Saline Water are called 2131 1

  • 1
    Sciophytes
    Correct
    Wrong
  • 2
    Bryophytes
    Correct
    Wrong
  • 3
    Halophytes
    Correct
    Wrong
  • 4
    Hydrophytes
    Correct
    Wrong
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Answer : 3. "Halophytes"
Explanation :

Answer: C) Halophytes Explanation: Plants that grow in Saline Water are called Halophytes.

Q: What is 15 of 80 with simple method and examples? 1603 0

  • 1
    12.5%
    Correct
    Wrong
  • 2
    18.75%
    Correct
    Wrong
  • 3
    16.55%
    Correct
    Wrong
  • 4
    17.80%
    Correct
    Wrong
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Answer : 2. "18.75%"
Explanation :

Answer: B) 18.75% Explanation: Given that to find 15 of 80 => What % of 80 is 15 Let it be 'p' => p% of 80 = 15 => p x 80100 = 15⇒p = 15 x 10080⇒p = 150080 = 18.75   Therefore, 15 is 18.75% of 80 => 18.75% of 80 = 15   Example:: Now, in the similar way we can find 15% of 80 =? => 15x80/100 = p => p = 4 x 3 = 12   Therefore, 15% of 80 = 12

Q: Coding-Decoding If Pour is wrtten as 4156Sware is written as 78269Clear is written as 3@926 Then what is the code for PEARL= ? 6432 0

  • 1
    429@6
    Correct
    Wrong
  • 2
    4962@
    Correct
    Wrong
  • 3
    4692@
    Correct
    Wrong
  • 4
    4926@
    Correct
    Wrong
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Answer : 4. "4926@"
Explanation :

Answer: D) 4926@ Explanation: Pour - 4156 => P = 4,  r = 6 Sware - 78269 => a =  2,  e = 9 Clear - 3@926 => l = @ => Pearl = 4926@

Q: Which of the following statements best describes nutrient density? 2787 0

  • 1
    Consume a variety of foods from MyPyramid's ±ve major food groups every day.
    Correct
    Wrong
  • 2
    Consume foods that have the most nutrition for their kcalories
    Correct
    Wrong
  • 3
    Choose a number of diFerent foods within any given food group rather than the same old thing.
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 2. "Consume foods that have the most nutrition for their kcalories"
Explanation :

Answer: B) Consume foods that have the most nutrition for their kcalories Explanation: Consume foods that have the most nutrition for their kcalories describes the Nutrient Density.

Q: Which is faster Light or Sound? 1444 1

  • 1
    Light
    Correct
    Wrong
  • 2
    Sound
    Correct
    Wrong
  • 3
    Both are same
    Correct
    Wrong
  • 4
    Can't be determined
    Correct
    Wrong
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Answer : 1. "Light"
Explanation :

Answer: A) Light Explanation: Light travels Faster than Sound.   Light : 1. Light doesn't require a medium to travel. 2. It travels in the vaccum with the speed of 1,86,000 miles per second.   Sound: 1. Sound rquire a medium. 2. It travels in the Air with the speed of 340 meters per second. 3. It travels Faster in Water than in Air. 4. It travels Faster in Steel than in Water.

Q: Which sentence is Punctuated correctly? 3203 0

  • 1
    The conference was only supposed to be an hour; however, it ran for nearly two and half hours.
    Correct
    Wrong
  • 2
    The conference was only supposed to be an hour, however; it ran for nearly two and half hours.
    Correct
    Wrong
  • 3
    The conference was only supposed to be an hour. however, it ran for nearly two and half hours.
    Correct
    Wrong
  • 4
    The conference was only supposed to be an hour; however it ran for nearly two and half hours.
    Correct
    Wrong
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Answer : 1. "The conference was only supposed to be an hour; however, it ran for nearly two and half hours."
Explanation :

Answer: A) The conference was only supposed to be an hour; however, it ran for nearly two and half hours. Explanation: The correct punctuated sentence is A The conference was only supposed to be an hour; however, it ran for nearly two and half hours.

Q: Is Air a Mixture? 1699 0

  • 1
    TRUE
    Correct
    Wrong
  • 2
    FALSE Answer & Explanation Answer:
    Correct
    Wrong
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Answer : 1. "TRUE"
Explanation :

Answer: A) TRUE Explanation: True, Air is a Mixture. Air is considered as mixture for the following reasons ; 1. Air can be separated into its components like N2, O2 , Argon and CO2 by the process of fractional distillation of liquid air. 2. Air shows the properties of all the gases present in the atmosphere. For example : Oxygen is good Supporter of combustion. Hence air also is good supporter of combustion. 3. Air does not have a fixed formula. 4. Air has a variable composition because air at different places contains different amount of gases. 5. Heat or Light energy is neither absorbed nor released when air is prepared physical by mixing required amount of gases . 6. Mixture does have fixed boiling Point. It holds good in case of liquid air.

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