IIT JEE Practice Question and Answer

Q: In general, which is the cause of a land breeze? 1778 0

  • 1
    Pressure
    Correct
    Wrong
  • 2
    Heat
    Correct
    Wrong
  • 3
    Temperature
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

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.

Q: 125 over 1000 in Simplest Form? 1778 0

  • 1
    2/9
    Correct
    Wrong
  • 2
    1/8
    Correct
    Wrong
  • 3
    3/8
    Correct
    Wrong
  • 4
    4/7
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "1/8"
Explanation :

Answer: B) 1/8 Explanation: 125 over 1000 in Simplest Form means 1251000 in its simple fraction form.   Now, to get the simplest form of 125/1000, find the HCF or GCD of both numerator and denominator i.e, 125 and 1000.   HCF of 125, 1000 = 125   Then, divide both numerator and denominator by 125 i.e, 1251251000125 = 18   Hence, 18 is the simplest form of 125 over 1000.

Q: What is the meaning of the four colour dots in the news paper? 1778 0

  • Show AnswerHide Answer
  • Workspace

Answer :
Explanation :

If you read newspaper daily, then you may be aware of the four coloured dots on the corner of the newspaper.    The four dots CMYK — blue (Cyan), pink (Magenta), Yellow and black (Kalio) are registration marks used during printing to help ensure the print is aligned properly. Any colour can be obtained by adding the correct proportion of these four colours.   CMYK is used as a base for the colours used in printing newspapers, and these four colours are often printed on the paper in either a heart, dot, or square shape.   To print an image, the plates of all these colours are laid out on a page separately and lined up in the same spot while printing. If those four dots are blur or you find the colours overlapping on the image it means the printing is not good. To print an accurate and perfect image, the colors and shape must be arranged precisely and must be claear sharp in order to get the best output.   That's why CMYK is also called registration mark. As physically checking all the pages of the paper is not possible for a printer who prints number of news papers daily, he just checks these dots.

Q: Who has been appointed as the new economic affairs secretary in the Union Finance Ministry  ? 1778 0

  • 1
    N. K. Sinha
    Correct
    Wrong
  • 2
    Tapan Ray
    Correct
    Wrong
  • 3
    Subhash C. Garg
    Correct
    Wrong
  • 4
    Kirti Singh
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "Subhash C. Garg"
Explanation :

Answer: C) Subhash C. Garg Explanation: Subhash C. Garg, a 1983 batch lAS officer of Rajasthan cadre, has been appointed as the new the economic affairs secretary in the Union Finance Ministry. The post fell vacant after Shaktikanta Das retired on May 31, 2017. Currently, Tapan Ray, the corporate affairs secretary, has the additional charge of the economic affairs department. Prior to this appointment, Garg was Executive Director at World Bank for Bangladesh, Bhutan, India and Sri Lanka.

Q: Which of the following is a characteristic of the Ascomycota? 1778 0

  • 1
    Sac formation
    Correct
    Wrong
  • 2
    Zygospore formation
    Correct
    Wrong
  • 3
    Basidium formation
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 1. "Sac formation"
Explanation :

Answer: A) Sac formation Explanation: Ascomycota is a division or phylum of the kingdom Fungi that, together with the Basidiomycota, form the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes.    Hence, Sac formation is a characteristic of the Ascomycota fungi.

Q: What goes up and down the stairs without moving? 1777 0

  • 1
    Umbrella
    Correct
    Wrong
  • 2
    Lift
    Correct
    Wrong
  • 3
    Stairs
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "Stairs"
Explanation :

Answer: C) Stairs Explanation: Those are stairs which goes up and down without moving.

Q: A man covered a certain distance at some speed. Had he moved 3 kmph faster, he would have taken 40 minutes less. If he had moved 2 kmph slower, he would have taken 40 minutes more. The distance (in km) is 1777 0

  • 1
    30
    Correct
    Wrong
  • 2
    36
    Correct
    Wrong
  • 3
    40
    Correct
    Wrong
  • 4
    42
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "40"
Explanation :

Answer: C) 40 Explanation: Let distance = x km and usual rate = y kmph.Then, x/y - x/(y+3) = 40/60 --> 2y (y+3) = 9x ----- (i)Also, x/(y-2) - x/y = 40/60 --> y(y-2) = 3x -------- (ii)On dividing (i) by (ii), we get: x = 40 km.

Q: Which of the following is true about blood plasma? 1777 0

  • 1
    The main protein component is hemoglobin.
    Correct
    Wrong
  • 2
    It is a faint yellow fluid.
    Correct
    Wrong
  • 3
    It is the same as serum but without the clotting proteins.
    Correct
    Wrong
  • 4
    It is about 90% water.
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "It is about 90% water."
Explanation :

Answer: D) It is about 90% water. Explanation: The first option is incorrect because it is devoid of blood cell, also red blood cells so doesn’t contains haemoglobin. The second option is incorrect because plasma is colorless. The third option is also incorrect because plasma contains the clotting factors.

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully