IIT JEE Practice Question and Answer

Q: Where are Maglev trains used? 1625 0

  • 1
    London
    Correct
    Wrong
  • 2
    Russia
    Correct
    Wrong
  • 3
    Germany
    Correct
    Wrong
  • 4
    Japan
    Correct
    Wrong
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Answer : 4. "Japan"
Explanation :

Answer: D) Japan Explanation: Maglev trains are used in Japan, South Korea and China only. Maglev derived from magnetic levitation using the principle of magnetic repulsion is a system of train transportation that uses two sets of magnets, one set to repel and push the train up off the track as in levitation then another set to move the 'floating train' ahead at great speed taking advantage of no friction. Maglev trains are therefore quieter and smoother than conventional trains, and have the potential for much higher speeds Despite over a century of research and development, maglev transport systems are in operation in just three countries Japan, South Korea and China.   Hence Maglev -- Magnetic-levitation.

Q: What does this symbol mean '&'? 2300 0

  • 1
    Caret
    Correct
    Wrong
  • 2
    Bar
    Correct
    Wrong
  • 3
    Ampersand
    Correct
    Wrong
  • 4
    Reversed Caret
    Correct
    Wrong
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Answer : 3. "Ampersand"
Explanation :

Answer: C) Ampersand Explanation: '&' is a Logical Symbol and is called as Ampersand.   ^ is called Caret - is called Bar v is called Reversed Caret.

Q: Lightning heats the surrounding air to 1960 0

  • 1
    300 deg Cent
    Correct
    Wrong
  • 2
    3000 deg Cent
    Correct
    Wrong
  • 3
    30000 deg Cent
    Correct
    Wrong
  • 4
    300000 deg Cent
    Correct
    Wrong
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Answer : 3. "30000 deg Cent"
Explanation :

Answer: C) 30000 deg Cent Explanation: Lightning is extremely hot — a flash can heat the air around it to temperatures five times hotter than the sun’s surface. This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash. Lightning heats the surrounding air to about 30,000 degrees Centigrades.

Q: Which statement best describes electrons? 1850 0

  • 1
    Electrons orbit around the nucleus
    Correct
    Wrong
  • 2
    Electrons are composed of protons and neutrons
    Correct
    Wrong
  • 3
    Electrons reside in the nucleus
    Correct
    Wrong
  • 4
    Electrons have a positive charge
    Correct
    Wrong
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Answer : 1. "Electrons orbit around the nucleus"
Explanation :

Answer: A) Electrons orbit around the nucleus Explanation: Electrons orbit around the nucleus is correct about them.

Q: A merchant commences with a certain capital and gains annually at the rate of 30 per cent. At the end of 2 years he has worth Rs 10,000. What was the original capital? 1427 0

  • 1
    Rs. 4987
    Correct
    Wrong
  • 2
    Rs. 5148
    Correct
    Wrong
  • 3
    Rs. 5917
    Correct
    Wrong
  • 4
    Rs. 6254
    Correct
    Wrong
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Answer : 3. "Rs. 5917"
Explanation :

Answer: C) Rs. 5917 Explanation: Let the Original capital amount be Rs. P Given after 2 years the amount is Rs. 10000 Rate of interest = 30% According to the question, P x 130100 x 130100 = 10000=> P = 1000000169 = 5917 Therefore, the capital amount P = Rs. 5917

Q: What type of Lipid is Estrogen? 1463 0

  • 1
    phospholipid
    Correct
    Wrong
  • 2
    steroid
    Correct
    Wrong
  • 3
    wax
    Correct
    Wrong
  • 4
    triglyceride
    Correct
    Wrong
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Answer : 2. "steroid"
Explanation :

Answer: B) steroid Explanation: Estrogen is a group of steroid hormone that control the development and maintenance of an individuals feminine characteristics. Natural estrogen exists in men as well as women and are found in higher amounts in women Especially in those of reproductive age.   Estrogens are hormones which are responsible to the body functions of the female body system such as menstruation, development of the female body such as pubic hair, breasts and development of the proportions of the body.   Lipids act as best energy storage molecules as the cleavage of fatty acids produces both energy and metabolic water which is a main component in almost all lipids.

Q: Unlike Mitosis, Meiosis results in the formation of 1668 0

  • 1
    2N daughter cells
    Correct
    Wrong
  • 2
    Haploid cells
    Correct
    Wrong
  • 3
    body cells
    Correct
    Wrong
  • 4
    Diploid cells
    Correct
    Wrong
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Answer : 2. "Haploid cells"
Explanation :

Answer: B) Haploid cells Explanation: Unlike Mitosis, Meiosis results in the formation of 4 Genetically different cells.   Meiosis results in the formation of 4 Haploid daughter cells from one Diploid parent cell.

Q: I can Honk without using a Horn. Who am I? 2047 0

  • 1
    Goose
    Correct
    Wrong
  • 2
    Crane
    Correct
    Wrong
  • 3
    Penguin
    Correct
    Wrong
  • 4
    Humming
    Correct
    Wrong
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Answer : 1. "Goose"
Explanation :

Answer: A) Goose Explanation: Goose can Honk without using a Horn. Geese are waterfowl of the family Anatidae.

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