IIT JEE Practice Question and Answer

Q: Digitized information can be used by computers. 1870 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. The computers and electronic devices use digitized information which is easily understood by them.   Digitization is the process of converting analog signals or information of any form into a digital format that can be understood by computer systems or electronic devices. The term is used when converting information, like text, images or voices, and sounds, into binary code.

Q: The most populous city in the world is  ? 1869 0

  • 1
    Tokyo
    Correct
    Wrong
  • 2
    Paris
    Correct
    Wrong
  • 3
    Peking
    Correct
    Wrong
  • 4
    London
    Correct
    Wrong
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Answer : 1. "Tokyo"
Explanation :

Answer: A) Tokyo Explanation:

Q: What kind of mathematics do scientists use to analyze data? 1869 0

  • 1
    Algebra
    Correct
    Wrong
  • 2
    Calculus
    Correct
    Wrong
  • 3
    Geometry
    Correct
    Wrong
  • 4
    Statistics
    Correct
    Wrong
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Answer : 4. "Statistics"
Explanation :

Answer: D) Statistics Explanation: Statistics is a branch of mathematics dealing with the collection, analysis, interpretation, presentation, and organization of data.   All scientists uses Statistics for analysing data.

Q: Who invented Bifocal Lens? 1869 0

  • 1
    John Adams
    Correct
    Wrong
  • 2
    Benjamin Franklin
    Correct
    Wrong
  • 3
    James Madison
    Correct
    Wrong
  • 4
    Thomas Jefferson
    Correct
    Wrong
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Answer : 2. "Benjamin Franklin"
Explanation :

Answer: B) Benjamin Franklin Explanation: Benjamin Franklin has long been credited with the invention of bifocal lenses and he was the first to wear bifocal lenses. He did not produce them himself but instead had some optician in London or France make them for him to overcome Presbyopia, a condition that Franklin suffered. He was tired switching between lenses for far and near sightedness. And that resulted in inventing Bifocal Lenses.

Q: How many feet are in a meter? 1869 0

  • 1
    3.214
    Correct
    Wrong
  • 2
    3.28084
    Correct
    Wrong
  • 3
    3.2516
    Correct
    Wrong
  • 4
    3.21456
    Correct
    Wrong
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Answer : 2. "3.28084"
Explanation :

Answer: B) 3.28084 Explanation: We know that,  1 meter = 100 cms.  => 1 meter = 3.28084 feet.

Q: If the digits in the number 25673948 are arranged in ascending order from left to right, what will be the sum of the digits which are fourth from the right and third from the left in the new arrangement? 1869 0

  • 1
    10
    Correct
    Wrong
  • 2
    9
    Correct
    Wrong
  • 3
    8
    Correct
    Wrong
  • 4
    6
    Correct
    Wrong
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Answer : 1. "10"
Explanation :

Answer: A) 10 Explanation: Given Number :      2 5 6 7 3 9 4 8   Ascending order :  2 3 4 5 6 7 8 9   Specified letters are 6 and 4 respectively.   Hence, required sum = (4 + 6 = 10)

Q: Which of the following elements has the highest electronegativity? 1869 0

  • 1
    Chlorine
    Correct
    Wrong
  • 2
    Bromine
    Correct
    Wrong
  • 3
    Fluorine
    Correct
    Wrong
  • 4
    Helium
    Correct
    Wrong
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Answer : 3. "Fluorine"
Explanation :

Answer: C) Fluorine Explanation: Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons. Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element and lithium is the least.

Q: In general, which is the cause of a land breeze? 1868 0

  • 1
    Pressure
    Correct
    Wrong
  • 2
    Heat
    Correct
    Wrong
  • 3
    Temperature
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 3. "Temperature"
Explanation :

Answer: C) Temperature Explanation: The land breeze is a coastal breeze at night blowing from the land to the ocean. It is caused by the difference in the rates of cooling of the land and of the ocean. Once again, the bigger the difference in temperature between the two, the stronger the wind.

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