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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Remembering +4 | -1

The valence shell of transition elements consists of

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Correct option: D

({n}-1) {d}

ns orbitals

Option D (

({n}-1) {d}

ns orbitals) is correct because transition elements lose electrons from both the (n-1)d and ns orbitals during ionization.

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Mercury is transported in metal containers made of: Cadmipone is a mixture of: The number of element from the following that do not belong to lanthanoids is :
Eu, Cm, Er, Tb, Yb and Lu Statement-I:

{Sm}^{3+}

{Dy}^{3+}

have same colour (yellow).

Statement-II: Both ions are having same number of unpaired electrons. The most common oxidation state of Lanthanoid
elements is +3. Which of the following is likely to
also form other oxidation state? A mixture of

\mathrm{Ti}{\mathrm{O}_2}

\mathrm{BaS}{\mathrm{O}_4}