(D) $Zr$ $(Z=40)$ belongs to the $5^{th}$ period,while $Hf$ $(Z=72)$ belongs to the $6^{th}$ period.Due to lanthanoid contraction,$Zr$ and $Hf$ exhibi

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Both of these belong to the same period of the periodic table

(D) $Zr$ $(Z=40)$ belongs to the $5^{th}$ period,while $Hf$ $(Z=72)$ belongs to the $6^{th}$ period.Due to lanthanoid contraction,$Zr$ and $Hf$ exhibit nearly identical atomic and ionic radii,making them chemical twins.Since they belong to different periods ($5^{th}$ and $6^{th}$),the statement that they belong to the same period is incorrect.

Class 12 Chemistry d-and f-Block Elements General Characteristics

Medium

Which of the following statements is incorrect for the pair of elements $Zr$ and $Hf$?

MHT CET 2017 All MHT CET

A
Both possess the same number of valence electrons
B
Both have identical atomic sizes
C
Both have almost identical ionic radii
D
Both of these belong to the same period of the periodic table

Explore More

Browse All

Question Bank

All Subjects

Class 12 Questions

Class 12

Chemistry Questions

Chapter

d-and f-Block Elements

Subtopic

General Characteristics

Previous Year

MHT CET 2017 Paper All MHT CET years →

The melting point of $Zn$ is lower compared to those of the other elements of the $3d$ series because $-$

Medium

View Solution

The transition metal with the highest melting point is:

EasyAP EAMCET 2024

View Solution

The transition metal which shows oxidation states from $+2$ to $+7$ belongs to group:

Easy

View Solution

Which of the following $3d$ bivalent metal ions has the smallest number of unpaired $d$ electrons?

Easy

View Solution

In which of the following pairs are both the ions coloured in aqueous solution?
(At. no. $:$ $Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27$)

MediumAIPMT 2006

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

Which of the following statements is incorrect for the pair of elements $Zr$ and $Hf$?

Similar Questions

The melting point of $Zn$ is lower compared to those of the other elements of the $3d$ series because $-$

The transition metal with the highest melting point is:

The transition metal which shows oxidation states from $+2$ to $+7$ belongs to group:

Which of the following $3d$ bivalent metal ions has the smallest number of unpaired $d$ electrons?

In which of the following pairs are both the ions coloured in aqueous solution?(At. no. $:$ $Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module

In which of the following pairs are both the ions coloured in aqueous solution?
(At. no. $:$ $Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27$)