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JEE Main Test 106

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JEE Main Test 106
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Weekly Quiz Competition
  • Question 1
    4 / -1

    The number of normals drawn to parabola y2 = 4x from the point (1, 0) is

    Solution

    The given point is focus of the given parabola. So, only one normal can be drawn.

     

  • Question 2
    4 / -1

    Identify B in the following reaction,

    Solution

     

  • Question 3
    4 / -1

    The expression for the solubility product of Ag2CO3 will be

    Solution

     

  • Question 4
    4 / -1

    A metal crystallizes with a face-centered cubic lattice. The edge length of the unit cell is 408 pm. The diameter of the metal atom is :

    Solution

    In face centred cubic unit cell (fcc) each particles are at corner and at face 

    ∴ Contribution of one unit cell = each 8 atoms contribute 1/8 + 1/2 atom on face

    Now,

     

  • Question 5
    4 / -1

    The best method to separate the mixture of ortho and para nitrophenol (1:1) is

    Solution

    O – nitrophenol is steam valatile due to intra molecular hydrogen bonding where as p – nitrophenol is less volatile due to intermolecular hydrogen bonding.

     

  • Question 6
    4 / -1

    Solution

     

  • Question 7
    4 / -1

    In the first order reaction, 75% of the reactant gets disappeared in 1.386 h. The rate constant of the reaction is

    Solution

     

  • Question 8
    4 / -1

    Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25° C . For this process the correct statement is

    Solution

     

  • Question 9
    4 / -1

    Half-life period of a radioactive element is 100 yr. How long will it take for its 93.75% decay ?

    Solution

     

  • Question 10
    4 / -1

    Silver iodide is used for producing artificial rain because AgI

    Solution

    There are also many ways to make rain in a cold cloud, but the most common way is to  use dry ice or silver ioxide. This is mainly because the temperature of dry ice is – 780C spreading dry ice in a cold cloud lacking ice crystals will rapidly transform supercooled water into ice crystals, which will eventually became rain without the help of ice-crystals nuclei.

    Silver ioxide on the otherhand, is a very effective ice – crystal nucleuis, so it act as an ice crystal nuclecus, can facilitate the solification of water drops below -50C into ice crystals.

     

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