IIT JEE Practice Question and Answer

Q: How can we get 24 as an answer by using 6, 11, 3 and 9? 1174 0

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Answer :
Explanation :

This can be solved in two ways using only 6, 11, 9 and 3 we must get 24. 1. {[(11–6) x 3] + 9} By solving this we get 5 x 3 + 9 = 15 + 9 = 24.   2. [(9–6) x (11–3)] = 3 x 8 = 24.

Q: What is the first step in Photosynthesis? 1892 1

  • 1
    Formation of ATP
    Correct
    Wrong
  • 2
    Joining of 3-carbon atom to form glucose
    Correct
    Wrong
  • 3
    Ionization of water
    Correct
    Wrong
  • 4
    Excitement of an electron of chlorophyll photon of light
    Correct
    Wrong
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Answer : 4. "Excitement of an electron of chlorophyll photon of light"
Explanation :

Answer: D) Excitement of an electron of chlorophyll photon of light Explanation: The first step in Photosynthesis is Excitement of an electron of chlorophyll photon of light.

Q: Li3PO4 compound name? 2569 0

  • 1
    Lithium perchlorate
    Correct
    Wrong
  • 2
    Lithium phyrite
    Correct
    Wrong
  • 3
    Lithium phosphate
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 3. "Lithium phosphate"
Explanation :

Answer: C) Lithium phosphate Explanation: The given compund Li3PO4 name is Lithium phosphate.   Lithium phosphate is a white crystal at room temperature. It is slightly soluble in water. It  can be used to produce glass, disk, colorful phosphor powder. It can also be used as a catalyst in some reactions.

Q: What are the building blocks of Nucleic Acids? 1580 0

  • 1
    Pentose Sugar
    Correct
    Wrong
  • 2
    DNA
    Correct
    Wrong
  • 3
    RNA
    Correct
    Wrong
  • 4
    Nucleotides
    Correct
    Wrong
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Answer : 4. "Nucleotides"
Explanation :

Answer: D) Nucleotides Explanation: The building blocks of the nucleic acids are "Nucleotides".   Each nucleotide are composed of three parts. They are :: 1.Pentose sugar 2.Nitrogenous bases 3.Phosphoric acid.

Q: Which is the best definition of Federalism? 1968 0

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    Federalism encourages the practice of direct democracy at the state level rather than the national level.
    Correct
    Wrong
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    The quality of federal supremacy in government.
    Correct
    Wrong
  • 3
    A happy combination of mixed government.
    Correct
    Wrong
  • 4
    Federalism enables the state and the national government to share power.
    Correct
    Wrong
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Answer : 4. "Federalism enables the state and the national government to share power."
Explanation :

Answer: D) Federalism enables the state and the national government to share power. Explanation: Federalism :: Federalism is a system based upon democratic rules and institutions in which the power to govern is shared between national and provincial/state governments, creating what is often called a federation.   Federalism is a political concept in which a group of members are bound together with a governing representative head.  Federalism enables the state and the national government to share power.

Q: Library is to Book as Book is to 3986 0

  • 1
    Words
    Correct
    Wrong
  • 2
    Pages
    Correct
    Wrong
  • 3
    Binding
    Correct
    Wrong
  • 4
    Cover
    Correct
    Wrong
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Answer : 2. "Pages"
Explanation :

Answer: B) Pages Explanation: A Library consists of Books in the same way Book consists Pages.   Hence, Library : Book :: Book : Pages.

Q: A bag contains 3 red balls, 5 yellow balls and 7 pink balls. If one ball is drawn at random from the bag, what is the probability that it is either pink or red? 1700 0

  • 1
    2/3
    Correct
    Wrong
  • 2
    1/8
    Correct
    Wrong
  • 3
    3/8
    Correct
    Wrong
  • 4
    3/4
    Correct
    Wrong
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Answer : 1. "2/3"
Explanation :

Answer: A) 2/3 Explanation: Given number of balls = 3 + 5 + 7 = 15 One ball is drawn randomly = 15C1 probability that it is either pink or red = 7C1 + 3C115C1 = 7 + 315 = 1015 = 23

Q: Which action is safe for a pwc? 9999 0

  • 1
    towing a skier behind a pwc rated for 3 people with two persons on board
    Correct
    Wrong
  • 2
    shutting off the engine before cleaning debris from the pump intake
    Correct
    Wrong
  • 3
    seating a child to small to hold on the operator in front of the operator
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 3. "seating a child to small to hold on the operator in front of the operator"
Explanation :

Answer: C) seating a child to small to hold on the operator in front of the operator Explanation: Two passengers behind the operator is safe for a PWC.

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