Exams › NEET › Chemistry

Because of lanthanoid contraction

1. zrand Y have about the same radius
2. zrand Nb have similar oxidation state
3. zrand \( H f \) have about the same radius
4. zrand zn have the same oxidation state

Correct answer: zrand \( H f \) have about the same radius

Solution

Lanthanoid contraction reduces the atomic/ionic radii of elements after the lanthanoids, especially the 5d series. As a result, zirconium and hafnium—though in different periods—have nearly the same radius.

Related NEET Chemistry questions

• A d-block element has total spin value of \( +3 . \) Then, the spin only magnetic moment of the element is approximately:
• Among the following organic acids, the acid present in rancid butter is:
• A ketone has molar mass \( 86 . \) Which of the following cannot be IUPAC name of this ketone?
• An ideal gas is compressed in a closed container its U?
• Which of the following will change the value of the equilibrium constant for the reaction? \( N_{2}(g)+O_{2}(g) \leftrightharpoons 2 N O(g) \)
• Electronic configuration \( [\boldsymbol{K} \boldsymbol{r}] \boldsymbol{4} \boldsymbol{d}^{10} \) belongs to:

⚔️ Practice NEET Chemistry free + battle 1v1 →