IIT JEE Practice Question and Answer

Q: Which of these relationships is true of an uncharged atom? 6102 0

  • 1
    The atomic mass is equal to the atomic number.
    Correct
    Wrong
  • 2
    The number of electrons is equal to the number of neutrons.
    Correct
    Wrong
  • 3
    The number of protons is equal to the number of electrons.
    Correct
    Wrong
  • 4
    The atomic mass is equal to the number of electrons.
    Correct
    Wrong
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Answer : 3. "The number of protons is equal to the number of electrons."
Explanation :

Answer: C) The number of protons is equal to the number of electrons. Explanation: The number of protons is equal to the number of electrons. That is the number of positive charges is equal to the number of negative charges.

Q: In a certain code language ‘ROUTINE’ is written as 'VMRGFLI'. How will 'CRUELTY' be written in that code language ? 6099 0

  • 1
    UPVCZLR
    Correct
    Wrong
  • 2
    VPCVZRL
    Correct
    Wrong
  • 3
    CVCPZRL
    Correct
    Wrong
  • 4
    VCPCZLR
    Correct
    Wrong
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Answer : 2. "VPCVZRL"
Explanation :

Answer: B) VPCVZRL Explanation: ROUTINE IS 7 LETTER WORD.. (1st=R,2nd=O,3rd=U,4th=T,5th=I,6th=N,7th=E)1st and 3rd letter interchanging. (UORTINE)5th and 7th letter interchanging. (UORTENI)1st letter shifting one after that (VORTENI)2nd letter shifting two befor that (VMRTENI)3rd letter remains same (VMRTENI)4th letter(total alphabets - current)+1(26 - 20)+1= 7.(i.e) G (VMRGFNI)5th letter shifting one after that (VMRGFNI)6th letter shifting two befor that (VMRGFLI)7th letter remains same (VMRGFLILike that,CRUELTY IS 7 LETTER WORD.. (1st=C,2nd=R,3rd=U,4th=E,5th=L,6th=T,7th=Y)1st and 3rd letter interchanging. (URCELTY)5th and 7th letter interchanging. (URCEYTL)1st letter shifting one after that (VRCEYTL)2nd letter shifting two befor that (VPCEYTL)3rd letter remains same (VPCEYTL)4th letter (total alphabets - current)+1(26 - 5)+1= 22.(i.e) V (VPCVYTL) 5th letter shifting one after that (VPCVZTL)6th letter shifting two befor that (VPCVZRL)7th letter remains same (VPCVZRL).

Q: 2 is to 55 as 6 is to 6095 0

  • 1
    99
    Correct
    Wrong
  • 2
    44
    Correct
    Wrong
  • 3
    9
    Correct
    Wrong
  • 4
    33
    Correct
    Wrong
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Answer : 1. "99"
Explanation :

Answer: A) 99 Explanation: Given 2 is to 55 2 + 3 = 5  5 x 11 = 55 Similarly, 6 6 + 3 = 9 9 x 11 = 99   Hence, 2 is to 55 as 6 is to 99.

Q: Two trains are moving in the same direction at 72 kmph and 36 kmph. The faster train crosses a girl sitting at window seat in the slower train in 32 seconds. Find the length of the faster train ? 6084 0

  • 1
    170 m
    Correct
    Wrong
  • 2
    100 m
    Correct
    Wrong
  • 3
    270 m
    Correct
    Wrong
  • 4
    320 m
    Correct
    Wrong
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Answer : 4. "320 m"
Explanation :

Answer: D) 320 m Explanation: Relative speed = (72 - 36) x 5/18 = 2 x 5 = 10 mps.Distance covered in 32 sec = 32 x 10 = 320 m. The length of the faster train = 320 m.

Q: 'P' walked 1 km towards south direction and turned  90oACW and walked 2 km. Then he turned his left and walked 1 km and then he turned his right and walked 2 km. After that he turned 90o ACW and walked 3 km. How far is he from the starting point ? 6081 0

  • 1
    5 km
    Correct
    Wrong
  • 2
    4 km
    Correct
    Wrong
  • 3
    2 km
    Correct
    Wrong
  • 4
    0 km
    Correct
    Wrong
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Answer : 1. "5 km"
Explanation :

Answer: A) 5 km Explanation:

Q: Pen is to poet as needle is to 6072 0

  • 1
    Sewing
    Correct
    Wrong
  • 2
    Thread
    Correct
    Wrong
  • 3
    Tailor
    Correct
    Wrong
  • 4
    Button
    Correct
    Wrong
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Answer : 3. "Tailor"
Explanation :

Answer: C) Tailor Explanation: Here Pen is a tool which is used to write and poet uses it. Then, the needle is a tool which is used to stitch and it is used by Tailor. Except tailor, none of the other options is a person to use it.   Hence, Pen : Poet :: Needle : Tailor

Q: The Capacity of a Communication Channel is Measured in 6054 0

  • 1
    Band rate
    Correct
    Wrong
  • 2
    Band width
    Correct
    Wrong
  • 3
    Data flow
    Correct
    Wrong
  • 4
    Bit capacity
    Correct
    Wrong
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Answer : 2. "Band width"
Explanation :

Answer: B) Band width Explanation: The path that data takes from source to destination is called a Channel. A channel is a communication medium. A channel has a certain capacity for transmitting information.    The "capacity" of a channel is the theoretical upper-limit to the bit rate over a given channel that will result in negligible errors. Channel capacity is often measured by its Bandwidth in Hz or its data rate in bits per second.

Q: 7 9 19 18 31 29 Find the odd number in the given Number Series? 6041 0

  • 1
    31
    Correct
    Wrong
  • 2
    29
    Correct
    Wrong
  • 3
    18
    Correct
    Wrong
  • 4
    19
    Correct
    Wrong
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Answer : 2. "29"
Explanation :

Answer: B) 29 Explanation: Here the given number series follows a pattern of two alternate series. 1. 7 19 31 ...(Difference of 12) 2. 9 18 27 ...(Difference of 9) Here the odd number is 29 instead of 27 And the next number is 31 + 12 = 43 & 27 + 9 = 36

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