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Strong reducing and oxidizing agents among the following , respectively, are

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Important Questions on The d- and f-Block Elements

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Gadolinium belongs of 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?
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Which of the following elements has the largest atomic radius?
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Because of lanthanoid contraction, which of the following pairs of elements have nearly the same atomic radii? (Number in the parenthesis are atomic numbers).
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The elements in which electrons are progressively filled in 4f orbital are called
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Which of the following pairs has the same size?
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Identify the incorrect statement from the following:
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What are the different oxidation states exhibited by lanthanoids?
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Incorrect statement with reference to Ce Z=58
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Why europium (II) is more stable than Cerium (II)?
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Given below are two statements :

Statement I : The E° value of Ce4+/Ce3+ is +1.74 V

Statement II : Ce is more stable in Ce4+ state than Ce3+ state.

In the light of the above statements, choose the most appropriate answer from the options given below:

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The pair that has similar atomic radii is:
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Name the members of the lanthanoid series which exhibit +4 oxidation state and those which exhibit +2 oxidation states. Try to correlate this type of behaviour with the electronic configuration of these elements.
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Decrease in ionic size in a period is observed in
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Write down the electronic configuration of Pm3+.
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The Eu2+ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost) : [Atomic number of Eu=63 ]
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Among the lanthanide Eu, Tb, Er and Dy, which one readily forms stable divalent ions?
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The correct electronic configuration and spin-only magnetic moment (BM) of Gd3+(Z=64), respectively, are :
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The effect of lanthanoid contraction in the lanthanoid series of elements by and large means