IIT JEE Practice Question and Answer

Q: How many right angles does a square have? 2023 0

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

Answer: C) 4 Explanation: A square and a rectangle each have 4 right (90 deg) angles.  Both square and rctangle have 4 sides and 4 angles, but the only difference is square is a rectangle with all sides equal.

Q: On a school’s Annual day sweets were to be equally distributed amongst 112 children. But on that particular day, 32 children were absent. Thus the remaining children got 6 extra sweets. How many sweets was each child originally supposed to get ? 2023 0

  • 1
    14
    Correct
    Wrong
  • 2
    16
    Correct
    Wrong
  • 3
    12
    Correct
    Wrong
  • 4
    15
    Correct
    Wrong
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Answer : 4. "15"
Explanation :

Answer: D) 15 Explanation: Let 'K' be the total number of sweets.Given total number of students = 112If sweets are distributed among 112 children,Let number of sweets each student gets = 'L' => K/112 = L ....(1)But on that day students absent = 32 => remaining = 112 - 32 = 80Then, each student gets '6' sweets extra. => K/80 = L + 6 ....(2)from (1) K = 112L substitute in (2), we get112L = 80L + 48032L = 480L = 15 Therefore, 15 sweets were each student originally supposed to get.

Q: How fast do satellites orbit the earth? 2023 0

  • 1
    28,000 kmph
    Correct
    Wrong
  • 2
    26,000 kmph
    Correct
    Wrong
  • 3
    17,500 kmph
    Correct
    Wrong
  • 4
    22,500 kmph
    Correct
    Wrong
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Answer : 1. "28,000 kmph"
Explanation :

Answer: A) 28,000 kmph Explanation: Satellites orbit the earth at a speed of 28,000 kmph. Satellites that are further away actually travel slower. The International Space Station has a Low Earth Orbit, about 400 kilometers (250 miles) above the earth's surface. Objects orbiting at that altitude travel about 28,000 kilometers per hour (17,500 miles per hour).

Q: Who has been appointed as the deputy director-general of World Health Organization (WHO) ? 2023 0

  • 1
    Dr. Soumya Swaminathan
    Correct
    Wrong
  • 2
    Rajat Nandan
    Correct
    Wrong
  • 3
    prof. Dr. Vikash Jha
    Correct
    Wrong
  • 4
    Sunil Narayan
    Correct
    Wrong
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Answer : 1. "Dr. Soumya Swaminathan"
Explanation :

Answer: A) Dr. Soumya Swaminathan Explanation: The World Health Organization is a specialized agency of the United Nations that is concerned with international public health. It was established on 7 April 1948, Headquartered in Geneva, Switzerland. Dr Soumya Swaminathan has been appointed the deputy director general for programmes (DDP) of World Health Organisation (WHO). She also holds a key position as secretary in the department of health research, ministry of health and family welfare.

Q: Peacock : India :: Bear : ? 2023 0

  • 1
    England
    Correct
    Wrong
  • 2
    America
    Correct
    Wrong
  • 3
    Russia
    Correct
    Wrong
  • 4
    Africa
    Correct
    Wrong
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Answer : 3. "Russia"
Explanation :

Answer: C) Russia Explanation: Here the relation between the given words is that the first word is the National animal of the second word. As Peacock is the national bird of India, similarly Bear is the national animal of Russia.   Hence, Peacock : India :: Bear : Russia.

Q: Express 3/8 and 1/10 as a Decimals? 2022 0

  • 1
    1.375 & 1
    Correct
    Wrong
  • 2
    0.375 & 1
    Correct
    Wrong
  • 3
    13.75 & 1.1
    Correct
    Wrong
  • 4
    0.375 & 0.1
    Correct
    Wrong
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Answer : 4. "0.375 & 0.1"
Explanation :

Answer: D) 0.375 & 0.1 Explanation: 3/8 as a Decimal : In this we should convert the denominator into 10, 100, 1000, 10000, 100000,... to make it simple. Now to make 8 into 1000, we multiply numerator and denominator with 125 => 3 x 1258 x 125 = 3751000 = 0.375   1/10 as a Decimal : 1 divided into 10 parts of each 0.1.   Therefore, 3/8 = 0.375 and 1/10 = 0.1 in decimals.

Q: Which of the following is malleable? 2022 0

  • 1
    Ice
    Correct
    Wrong
  • 2
    Gold
    Correct
    Wrong
  • 3
    Stone
    Correct
    Wrong
  • 4
    Pottery
    Correct
    Wrong
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Answer : 2. "Gold"
Explanation :

Answer: B) Gold Explanation: Here in the given options, Gold is a malleable substance. Malleable substance means a metal or a material able to be hammered or pressed into shape without breaking or cracking. i.e, tensile.

Q: The first stage in the formation of coal is 2022 1

  • 1
    Lignite
    Correct
    Wrong
  • 2
    Bituminous
    Correct
    Wrong
  • 3
    Anthracite
    Correct
    Wrong
  • 4
    Peat
    Correct
    Wrong
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Answer : 4. "Peat"
Explanation :

Answer: D) Peat Explanation: The first of the four stages of coal formation is lignite coal.   There are four stages of coal formation:   1. Peat,   2. Lignite,   3. Bituminous and   4. Anthracite. The bacteria has removed a large portion of the other constituents of the plant matter and left around 25 to 34 percent.

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