Which of the following statement concerning lanthanides elements … - Vidyadip

MCQ

Which of the following statement concerning lanthanides elements is false

A
Lanthanides are separated from one another by ion exchange method
✓
Ionic radii of trivalent lanthanides steadily increases with increase in the atomic number
C
All lanthanides are highly dense metals
D
More characteristic oxidation state of lanthanide elements is $+3$

✓

Answer

Correct option: B.

Ionic radii of trivalent lanthanides steadily increases with increase in the atomic number

b
(b) Ionic radius of trivalent lanthanide’s almost remains constant with increase in the atomic number.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Mark the variety of iron which has highest melting point

$2 \,mole$ of zinc is dissolved in $HCl$ at $25\,^oC$ the work done in open vessel is

If ${H^ + }$ ion concentration of a solution is increased by $10 $ times its $ pH $ will be

The major product of the reaction is :

Which of the following orbitals is non-directional

Solubility product for salt $A{B_2}$ is $4 \times {10^{ - 12}}$. Calculate solubility

$\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
Ph-C-C{{H}_{3}}\xrightarrow[HCl]{NaN{{O}_{2}}}(A)\xrightarrow[heat]{A{{C}_{2}}O}(B)\xrightarrow{{{H}_{3}}{{O}^{+}}}(C) \\
\end{matrix}$

Product $(C)$ of the above reaction is

The conversion, $PhCN \to PhCOCH_3,$ can be achieved most conveniently by reaction with

Strongest bond is

Which of the following compounds does give $N_2$ on heating?