IIT JEE Practice Question and Answer

Q: In which city the world's tallest sandcastle has been built  ? 1431 0

  • 1
    Duisburg
    Correct
    Wrong
  • 2
    Berlin
    Correct
    Wrong
  • 3
    Havana
    Correct
    Wrong
  • 4
    Paris
    Correct
    Wrong
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Answer : 1. "Duisburg"
Explanation :

Answer: A) Duisburg Explanation:

Q: Plant development is influenced by 1431 0

  • 1
    quality, quantity and duration of light
    Correct
    Wrong
  • 2
    quality and duration of light
    Correct
    Wrong
  • 3
    quality and quantity of light
    Correct
    Wrong
  • 4
    quality of light only
    Correct
    Wrong
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Answer : 1. "quality, quantity and duration of light"
Explanation :

Answer: A) quality, quantity and duration of light Explanation: Plants and animals are separated by about 1.5 billion years of evolutionary history. They have evolved their multicellular organization independently but using the same initial toolkit — the set of genes inherited from their common unicellular eucaryotic ancestor. Two basic peculiarities of plants are: First, they get their energy from sunlight, not by ingesting other organisms. This dictates a body plan different from that of animals. Second, their cells are encased in semirigid cell walls and cemented together, preventing them from moving as animal cells do. This dictates a different set of mechanisms for shaping the body and different developmental processes to cope with a changeable environment. Because they cannot match themselves to their environment by moving from place to place, plants adapt instead by altering the course of their development. Their strategy is opportunistic. A given type of organ—a leaf, a flower, or a root, say—can be produced from the fertilized egg by many different paths according to environmental cues.   Hence, Plant development is influenced by quality, quantity and duration of light.

Q: If 25% of three-seventh of 26% of a number is 145.5, what is the number? 1431 0

  • 1
    4987
    Correct
    Wrong
  • 2
    5784
    Correct
    Wrong
  • 3
    5223
    Correct
    Wrong
  • 4
    4741
    Correct
    Wrong
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Answer : 3. "5223"
Explanation :

Answer: C) 5223 Explanation: Given,    25% of three-seventh of 26% of a number is 145.5   Let the required number be 'N'   i.e, 25100x37x26100xN = 145.5   N = 145.5x7x1000075x26   => N = 5223.07

Q: Which of the following elements has the lowest electronegativity 1429 0

  • 1
    Bromine
    Correct
    Wrong
  • 2
    Fluorine
    Correct
    Wrong
  • 3
    Carbon
    Correct
    Wrong
  • 4
    Lithium
    Correct
    Wrong
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Answer : 4. "Lithium"
Explanation :

Answer: D) Lithium Explanation: Electronegativity is the tendency for an atom to attract electrons. There are general trends on the periodic table which you can use to determine the relative electronegativity for different elements, but otherwise you can also look at their valence shell and effective nuclear charge to determine their relative electronegativity.   Here from the given options, Lithium has least tendency to attract electrons and thus has a lower electronegativity.

Q: Which State Government has approved one per cent reservation for orphans in government jobs under general category? 1428 0

  • 1
    Haryana
    Correct
    Wrong
  • 2
    Maharashtra
    Correct
    Wrong
  • 3
    Madhya Pradesh
    Correct
    Wrong
  • 4
    Uttar Pradesh
    Correct
    Wrong
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Answer : 2. "Maharashtra"
Explanation :

Answer: B) Maharashtra Explanation:

Q: What will come in place of the question mark (?) in the following question ? 52.5% of 800 + 30.5% of 2800 = ? + 87.30 1428 0

  • 1
    1096.30
    Correct
    Wrong
  • 2
    1226.70
    Correct
    Wrong
  • 3
    1124.20
    Correct
    Wrong
  • 4
    1186.70
    Correct
    Wrong
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Answer : 4. "1186.70"
Explanation :

Answer: D) 1186.70 Explanation: 52.5% of 800 + 30.5% of 2800 = ? + 87.30 420 + 854 - 87.30 = ? 1274 - 87.30 = ? ? = 1186.70

Q: Which of these is an example of government corruption? 1427 0

  • 1
    tax revenue
    Correct
    Wrong
  • 2
    contracting
    Correct
    Wrong
  • 3
    cronyism
    Correct
    Wrong
  • 4
    all the above
    Correct
    Wrong
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Answer : 3. "cronyism"
Explanation :

Answer: C) cronyism Explanation: Cronyism is the practice of partiality in awarding jobs and other advantages to friends, family relatives or trusted colleagues, especially in politics and between politicians and supportive organizations.

Q: Which of the following is present in a prokaryotic cell? 1426 0

  • 1
    Ribosomes
    Correct
    Wrong
  • 2
    Chloroplast
    Correct
    Wrong
  • 3
    Mitochondria
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "Ribosomes"
Explanation :

Answer: A) Ribosomes Explanation: Ribosomes are present in prokaryotic cells. These are organelles which consist of two subunits. They are present in both Eukaryotic and Prokaryotic cells. They are made up of RNA and proteins and present in the cytoplasm and on the membranes and are involved in protein synthesis.

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