Self Studies

The d- and f- B...

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  • Question 1
    1 / -0

    K2Cr2O7K_2Cr_2O_7 on heating with aqueous NaOHNaOH, gives:

  • Question 2
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    Following elements do not show the properties characteristic of d-block elements :

  • Question 3
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    Which shows maximum magnetic moment among the bivalent ions of the first transition series ?

  • Question 4
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    What is the correct order of covalent size of the following ?
    Nb ______ Ta

  • Question 5
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    The correct order of ionic radii of Y3+,La3+,Eu3+Y^{3+}, La^{3+}, Eu^{3+} and Lu3+Lu^{3+} is:
    (Atomic number of Y=39, La=57, Eu=63, Lu=71)

  • Question 6
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    To protect iron against corrosion, the most durable metal plating on it, is :

  • Question 7
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    CrO3+H2OAOHBCrO_3 +H_2O \rightarrow A \overset{OH^-}{\rightarrow}B

    What are  AA and BB in the above reaction?

  • Question 8
    1 / -0

    The atomic radii of cerium and promethium are quite similar because

  • Question 9
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    The transition metal used as a catalyst is :

  • Question 10
    1 / -0

    FeFe is made passive by:

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