Zn and Cd metals do not show variable valency because - Vidyadip

MCQ

$Zn$ and $Cd$ metals do not show variable valency because

A
They have only two electrons in the outermost subshells
✓
Their $d-$ subshells are completely filled
C
Their $d-$ subshells are partially filled
D
They are relatively soft me

✓

Answer

Correct option: B.

Their $d-$ subshells are completely filled

b
$d$-block elements show variable valency due to their incomplete $d$-orbitals but as $d$-orbitals of $Zn$ and $Cd$ are fully filled so they do not show variable valency.

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

It has been found that for a chemical reaction with rise in temperature by $9\, K$ the rate constant gets doubled. Assuming a reaction to be occurring at $300\, K$, the value of activation energy is found to be $......\,k\,J \,mol ^{-1}$. [nearest integer]

(Given $\ln 10=2.3, R =8.3 JK ^{-1} mol ^{-1}, \log 2=0.30$ )

Which of the following pair are metamer ?

The conversion of $Pb{O_2}$ to $Pb{(N{O_3})_2}$is

Glucose has optical isomers

In a solution of $pH = 5,$ more acid is added in order to reduce the $pH = 2.$ The increase in hydrogen ion concentration is......$times$

Among the following, the one which reacts most readily with ethanol is

An atom has the electronic configuration of $1{s^2},2{s^2}2{p^6}$, $3{s^2}3{p^6}3{d^{10}},4{s^2}4{p^5}$. Its atomic weight is $ 80.$ Its atomic number and the number of neutrons in its nucleus shall be

Which complex is most stable ?

Where $kd =$ Dissociation constant

The complexes $[Co(NH_3)_6][Cr(CN)_6]$ and $[Cr(NH_3)_6][Co(CN)_6]$ are the examples of which type of isomerism?

The size of the species, $Pb, Pb^{2+} , Pb^{4+}$ decreases as