JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

1 Medium

1 of 1

Remembering +4 | -1

Which one of the following pairs of elements is called ‘chemical twins’ because of their very similar chemical properties?

View answer and explanation

Correct option: D

Hf and Zr

Option D (Hf and Zr) is correct because Hafnium (Hf) and Zirconium (Zr) have very similar chemical properties due to their similar ionic radii caused by lanthanide contraction, making them 'chemical twins'.

More Questions from d & f- BLOCK ELEMENTS

Practice All Chapter MCQs →

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}

and

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

is called