IIT JEE Practice Question and Answer

Q: Tanjore kingdom was founded by Raja Odeyar. True or False ? 1067 0

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

Answer: B) FALSE Explanation:  Mysore kingdom was founded by Raja Odeyar.

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Answer :
Explanation :

We can make an equation: 3(100000 + x) = 10x+1 (Why? Well, adding 100000 puts a 1 at the front of a five-digit number, and multiplying by 10 and adding 1 puts a 1 at the end of a number) Solving this gives: 10x+1 = 3(100000 + x) 10x+1 = 300000 + 3x 10x = 299999 + 3x7x = 299999x = 299999/7 = 42857 The answer is 42857 (142857 is three times smaller than 428571).

Q: Who is the author of the book "The Hungry Tide"? 1045 0

  • 1
    Mitali Meelan
    Correct
    Wrong
  • 2
    Ravinder Singh
    Correct
    Wrong
  • 3
    Amitav Ghosh
    Correct
    Wrong
  • 4
    Sudha Murty
    Correct
    Wrong
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Answer : 3. "Amitav Ghosh"
Explanation :

Answer: C) Amitav Ghosh Explanation:

Q: Which Color has the Longest Wavelength? 1041 0

  • 1
    Violet
    Correct
    Wrong
  • 2
    Yellow
    Correct
    Wrong
  • 3
    Red
    Correct
    Wrong
  • 4
    White
    Correct
    Wrong
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Answer : 3. "Red"
Explanation :

Answer: C) Red Explanation: The visible colors from Longest wavelength to Shortest wavelength are :: Red, Orange, Yellow, Green, Blue and Violet.                     Red > Orange > Yellow > Green > Blue > Violet.   1. Infrared radiation has a longer wavelength than visible Red light.   2. Ultraviolet radiation has a shorter wavelength than the visible violet light.    3. The white light is a mixture of the colors of the visible spectrum.

Q: 1 Joule is Equal to 1041 0

  • 1
    10^3 ergs
    Correct
    Wrong
  • 2
    10^6 ergs
    Correct
    Wrong
  • 3
    10^7 ergs
    Correct
    Wrong
  • 4
    10^5 ergs
    Correct
    Wrong
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Answer : 3. "10^7 ergs"
Explanation :

Answer: C) 10^7 ergs Explanation: 1 Joule = 107 ergs = 0.000239 Kilo Calories. Joule is the Unit of Energy. Joule is equal to Energy transferred to an object when a force of One Newton acts on that object in the direction of its motion through a distance of one metre.(1 N-m)

Q: Which sample is a pure substance? 1041 0

  • 1
    Table salt
    Correct
    Wrong
  • 2
    Pure water
    Correct
    Wrong
  • 3
    a test tube of zinc oxide
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 4. "All the above"
Explanation :

Answer: D) All the above Explanation: A pure substance can be defined as any single type of material that has not been contaminated by another substance. In chemistry, a pure substance has a definite composition. It can be a compound or an element. A pure substance is considered to be a material that consists of one type of "building block" of matter. Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Tin, sulfur, and diamond are examples of pure substances which are chemical elements. All elements are pure substances. Water, sugar, salt and baking soda are pure substances which are chemical compounds. Chemical compounds also are pure substances

Q: In 1914 congress formed the federal trade commission to 1031 0

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Answer :
Explanation :

When the FTC was created in 1914, its purpose was to monitor all business practices to prevent unfair methods of competition in commerce as part of the battle to "bust the trusts."   Over the years, Congress passed additional laws giving the agency greater authority to police anticompetitive practices.

Q: Which of the following is a Composite number? 1027 0

  • 1
    0
    Correct
    Wrong
  • 2
    19
    Correct
    Wrong
  • 3
    29
    Correct
    Wrong
  • 4
    91
    Correct
    Wrong
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Answer : 4. "91"
Explanation :

Answer: D) 91 Explanation: Here in the given numbers 91 is a Composite number. Since it has factors of 7 and 13 other than 1 and itself.   Composite Numbers : A composite number is a positive integer which is not prime (i.e., which has factors other than 1 and itself). Examples :: 4, 6, 8, 12, 14, 15, 18, 20, ...

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