IIT JEE Practice Question and Answer

Q: Trips and Trims are the terms associated with 3011 0

  • 1
    IBRD
    Correct
    Wrong
  • 2
    WTO
    Correct
    Wrong
  • 3
    IDA
    Correct
    Wrong
  • 4
    IMF
    Correct
    Wrong
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Answer : 2. "WTO"
Explanation :

Answer: B) WTO Explanation: TRIM "Trade-related Investment Measures", an agreement within the Uruguay round trade negotiations. TRIPS "TRADE-RELATED ASPECTS OF INTELLECTUAL PROPERTY RIGHTS, is an international legal agreement between all the member nations of the World Trade Organization (WTO).

Q: There are several peacocks and deers in a cage (with no other types of animals). There are 72 heads and 200 feet inside the cage. How many peacocks are there, and how many deers ? 3006 0

  • 1
    42 & 24
    Correct
    Wrong
  • 2
    38 & 26
    Correct
    Wrong
  • 3
    36 & 24
    Correct
    Wrong
  • 4
    44 & 28
    Correct
    Wrong
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Answer : 4. "44 & 28"
Explanation :

Answer: D) 44 & 28 Explanation: Letx = peacocks y = deers 2x + 4y = 200 x + y = 72 y = 72 - x 2x + 288 - 4x = 200 x = 44 peacocks y = 28 deers

Q: Which best matches the description with the genetic material? 3004 0

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    Chromosomes are located in the cytoplasm.
    Correct
    Wrong
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    DNA is located in the nucleus.
    Correct
    Wrong
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    Nucleotides form a helical structure that is called a gene.
    Correct
    Wrong
  • 4
    Chromosomes create genes.
    Correct
    Wrong
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Answer : 2. "DNA is located in the nucleus."
Explanation :

Answer: B) DNA is located in the nucleus. Explanation: DNA is the genetic material in the cell.    Hence, option B) DNA is located in the nucleus best matches the description with the genetic material.

Q: How many zeros are there from 1 to 10000 ? 3004 0

  • 1
    2893
    Correct
    Wrong
  • 2
    4528
    Correct
    Wrong
  • 3
    6587
    Correct
    Wrong
  • 4
    4875
    Correct
    Wrong
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Answer : 1. "2893"
Explanation :

Answer: A) 2893 Explanation: For solving this problem first we would break the whole range in 5 sections 1) From 1 to 9Total number of zero in this range = 0 2) From 10 to 99Total possibilities = 9*1 = 9 ( here 9 is used for the possibilities of a non zero integer) 3) From 100 to 999 - three type of numbers are there in this range a) x00 b) x0x c) xx0 (here x represents a non zero number)Total possibilities for x00 = 9*1*1 = 9, hence total zeros = 9*2 = 18for x0x = 9*1*9 = 81, hence total zeros = 81similarly for xx0 = 81 total zeros in three digit numbers = 18 + 81 +81 = 180 4) From 1000 to 9999 - seven type of numbers are there in this rangea)x000 b)xx00 c)x0x0 d)x00x e)xxx0 f)xx0x g)x0xxTotal possibilities for x000 = 9*1*1*1 = 9, hence total zeros = 9*3 = 27 for xx00 = 9*9*1*1 = 81, hence total zeros = 81*2 = 162 for x0x0 = 9*1*9*1 = 81, hence total zeros = 81*2 = 162for x00x = 9*1*1*9 = 81, hence total zeros = 81*2 = 162 for xxx0 = 9*9*9*1 = 729, hence total zeros = 729*1 = 729for xx0x = 9*9*1*9 = 729, hence total zeros = 729*1 = 729for x0xx = 9*1*9*9 = 729, hence total zeros = 729*1 = 729total zeros in four digit numbers = 27 + 3*162 + 3*729 = 2700thus total zeros will be 0+9+180+2700+4 (last 4 is for 4 zeros of 10000)= 2893

Q: Play is to actor as concert is to 2999 0

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    Musician
    Correct
    Wrong
  • 2
    percussion
    Correct
    Wrong
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    symphony
    Correct
    Wrong
  • 4
    piano
    Correct
    Wrong
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Answer : 1. "Musician"
Explanation :

Answer: A) Musician Explanation: An actor performs in a play. A musician performs at a concert. Choices b, c, and d are incorrect because none is people who perform.   Hence, Play is to actor as concert is to Musician.

Q: The reactivity of an atom arises from 2998 0

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    the existence of unpaired electrons in the valence shell
    Correct
    Wrong
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    the energy differences between the electron shells
    Correct
    Wrong
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    the sum of the potential energies of all the electron shells
    Correct
    Wrong
  • 4
    the average distance of the outermost electron shell from the nucleus
    Correct
    Wrong
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Answer : 1. "the existence of unpaired electrons in the valence shell"
Explanation :

Answer: A) the existence of unpaired electrons in the valence shell Explanation: When atoms react they do so in order to reach the lowest energy, which is the most stable. The electrons orbitals will overlap in the way that reduces the energy the most. Orbitals of similar energy will produce the greatest stabilisation.The answer you gave isn't the whole story, it depends what species is reacting with what. The effective nuclear charge on the atom will affect the energy of the valance electrons.   Hence, the reactivity of an atom arises from the existence of unpaired electrons in the valence shell.

Q: A group consists of 4 men, 6 women and 5 children. In how many ways can 2 men , 3 women and 1 child selected from the given group ? 2996 0

  • 1
    600
    Correct
    Wrong
  • 2
    610
    Correct
    Wrong
  • 3
    609
    Correct
    Wrong
  • 4
    599
    Correct
    Wrong
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Answer : 1. "600"
Explanation :

Answer: A) 600 Explanation: Two men, three women and one child can be selected in ⁴C₂ x ⁶C₃ x ⁵C₁ ways = 600 ways.

Q: '.bak' extension refers to what kind of file? 2994 0

  • 1
    Document
    Correct
    Wrong
  • 2
    Movie/Video file
    Correct
    Wrong
  • 3
    Backup file
    Correct
    Wrong
  • 4
    Audio file
    Correct
    Wrong
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Answer : 3. "Backup file"
Explanation :

Answer: C) Backup file Explanation: In computing, ".bak" is a filename extension commonly used to signify a backup copy of a file.

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