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JEE Main Test 89

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JEE Main Test 89
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Weekly Quiz Competition
  • Question 1
    4 / -1

    If [x]denotes the greatest integer less than or equal to x for any real number x. Then,

    Solution

     

  • Question 2
    4 / -1

    Penetrating power of waves are

    Solution

     

  • Question 3
    4 / -1

    The colour of light absorbed by an aqueous solution of CuSO4 is

    Solution

    If a solution absorbs a part of visible range of the spectrum which is transmitted, eg., a copper sulphate solution absorbs light at the red end of the spectrum and is blue in color. Comparision of colored solutions with a series of similar solutions containing known concentration of the colored compound permits eleimination of the concentration of the substance responsible for the color.

     

  • Question 4
    4 / -1

    Among the following oxoacids, the correct decreasing order of acid strength is

    Solution

    In general, the more attracted the proton is to the conjugate base, the more unfavourable the dissociation is, and the weaker the acid.

    Attaching more oxygen atoms to the central atom in an oxoacid helps to distribute the negative charge of the conjugate base over a great number of atoms. YThis makes the proton less strongly attracted to any one of the oxygen atoms in the conjugated base. Hence we get strong acid.

    Hence more the oxygen atoms → higher is the acidity.

    ∴ The order is HClO4>HClO3>HClO2>HOCl

     

  • Question 5
    4 / -1

    Which do not decolourise KMnO4 aqueous solution?

    Solution

     

  • Question 6
    4 / -1

    If g is the inverse of a function f and

    Solution

     

  • Question 7
    4 / -1

    A solution containing 2.675 g of CoCl3 ∙ 6NH3 (molar mass = 267.5 g mol-1) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give 4.78 g of AgCl (molar mass = 143.5 g mol-1). The formula of the complex is (Atomic mass of Ag = 108 u)

    Solution

     

     

  • Question 8
    4 / -1

    In the preparation of chlorobenzene from aniline, the most suitable reagent is

    Solution

    Chlorobenzene can be prepared from aniline by diazotization followed by treating diazonium salt with Cu2Cl2 (sandymeyer’s reaction).

     

  • Question 9
    4 / -1

    Which of the following is considered to be an anti-cancer species ?

    Solution

    Cis-platin is chemotherapy drug, which is the first member of class of platinum – containing anti – cancer drugs. These platinum complexes react in vivo, binding to and causing cross-linking of DNA, which ultimately triggers apoptosis (i.e programmed cell death).

     

  • Question 10
    4 / -1

    Solution

     

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