IIT JEE Practice Question and Answer

Q: Which of the following is not a Jovian┬аplanet? 1896 0

  • 1
    Jupiter
    Correct
    Wrong
  • 2
    Earth
    Correct
    Wrong
  • 3
    Saturn
    Correct
    Wrong
  • 4
    Neptune
    Correct
    Wrong
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Answer : 2. "Earth"
Explanation :

Answer: B) Earth Explanation: Earth is not a Jovian Planet as it is a Terrestrial┬аplanet. A planet designated as Jovian is hence a gas giant, composed primarily of hydrogen and helium gas with varying degrees of heavier elements. ┬а Within the Solar System, four Jovian planets exist тАУ Jupiter, Saturn, Uranus, and Neptune. Though these planets vary in terms of size, mass, and composition, they all share certain characteristics that cause them to differ greatly from the terrestrial planets located in the inner Solar System.

Q: What is so delicate that even mentioning it breaks it? 1896 0

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Answer :
Explanation :

Silence is┬аwhat┬аis so delicate that even mentioning it breaks it.

Q: Maths Challenge 1896 0

  • 1
    19
    Correct
    Wrong
  • 2
    38
    Correct
    Wrong
  • 3
    22
    Correct
    Wrong
  • 4
    40
    Correct
    Wrong
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Answer : 4. "40"
Explanation :

Answer: D) 40 Explanation: To get a pair of black rings 100 percent certain 27 blue + 17 red + 2 black = 40 rings should be taken out Then only we can get 100 % a pair of black rings.

Q: What is the meaning of the four colour dots in the news paper? 1895 0

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Answer :
Explanation :

If you read newspaper daily, then you may be aware of the four coloured dots on the corner of the newspaper.┬а ┬а The four dots CMYK тАФ 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. ┬а 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. ┬а 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. ┬а 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.

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Answer :
Explanation :

The Riddle itself has the Answers. What is a 4 letter word Yet is written in 3 letters Everything is written with 9 letters Then with 4 letters Rarely has 6 letters Never is written in 5 letters.

Q: The profit earned by selling an article for Rs. 832 is equal to the loss incurred when the same article is sold for Rs. 448. What should be the sale price for making 50% profit ? 1895 0

  • 1
    Rs. 660
    Correct
    Wrong
  • 2
    Rs. 560
    Correct
    Wrong
  • 3
    Rs. 1060
    Correct
    Wrong
  • 4
    Rs. 960
    Correct
    Wrong
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Answer : 4. "Rs. 960"
Explanation :

Answer: D) Rs. 960 Explanation: Let C.P. = Rs. C. Then, 832 - C = C - 4482C = 1280 => C = 640Required S.P. = 150% of Rs. 640 = 150/100 x 640 = Rs. 960.

Q: Which technology is used in compact disks? 1894 1

  • 1
    Laser
    Correct
    Wrong
  • 2
    Mechanical
    Correct
    Wrong
  • 3
    Electrical
    Correct
    Wrong
  • 4
    Electro magnetic
    Correct
    Wrong
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Answer : 1. "Laser"
Explanation :

Answer: A) Laser Explanation: Compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony and released in 1982.┬а These are actually made to replace floppy disks that were used to store files and programs from the computer. ┬а The format was originally developed to store and play only sound recordings but was later adapted for storage of data (CD-ROM). ┬а These CD's uses Laser technology.

Q: Which of the following is an example of polygenic inheritance? 1894 0

  • 1
    Skin pigmentation in humans
    Correct
    Wrong
  • 2
    Huntington╩╣s disease in humans
    Correct
    Wrong
  • 3
    White and purple flower color in peas
    Correct
    Wrong
  • 4
    The ABO blood groups in humans
    Correct
    Wrong
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Answer : 1. "Skin pigmentation in humans"
Explanation :

Answer: A) Skin pigmentation in humans Explanation: Polygenic inheritance involves the determination of a particular phenotypic characteristic by many genes, called polygenes(group of genes influencing a quantitative characteristic), each having a small effect individually. Height and skin colour in humans are examples of Polygenic characters.

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