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s-Block Elements Test - 3

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s-Block Elements Test - 3
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  • Question 1
    1 / -0

    Group IlA of the periodic table consists of the six elements are collectively known as

    Solution

    because their oxide and hydroxide are alkaline in nature and these metal oxide are found in earth's crust

     

  • Question 2
    1 / -0

    One of the following is highly radioactive

    Solution

    Fr is highly radioactive metal, that decays in to astatine,,radium and radon , it is also highly unstable element found only in trace amount on earth.

     

  • Question 3
    1 / -0

    The substance used in the preparation of HCl is

  • Question 4
    1 / -0

    Calcium and Magnesium belong to the category of

    Solution

    calcium and megnesium are 2nd group element of periodic table which are obtaine on earth in the form ore, their oxides and hydroxide are alkaline in nature so they are alkaline earth metals

     

  • Question 5
    1 / -0

    The most common alum is

  • Question 6
    1 / -0

    Which of the following compounds is known as "photographer's fixer"?

  • Question 7
    1 / -0

    Sodium and potassium belong to the category of

    Solution

    Na and K are shiny, soft, highly reactive metal at standard temperature and pressure and electronic configuration of Na & K  is ns2, compounds of Na & K are available most aboundenty in nature so these two are alkali metal.

     

  • Question 8
    1 / -0

    A cracking sound is produced when crystals of NaCl are thrown in fire. This is due to the

  • Question 9
    1 / -0

    Which of the following is used for taking the X-ray spectra of the digestive system?

  • Question 10
    1 / -0

    Increase in ionic radii of alkali metals  in aqueous solution (hydration) follow the order

    Solution

    The alkali metal ions get extensively hydrated in aqueous solution. Smaller the ion more is the degree of hydration.

     

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