Which shows variable valency - Vidyadip

MCQ

Which shows variable valency

A
$s$ - block elements
B
$p$ - block elements
✓
$d$ - block elements
D
Radioactive elements

✓

Answer

Correct option: C.

$d$ - block elements

c
$d$-block elements have empty inner orbitals, the electrons are added to incomplete inner shells. Thus they show variable valencies.

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

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

Similar questions

When the electron passes from energy state nearest to the nucleus to third energy level, it will :

In Lother Meyer curve, descending position (next to peak) is held by

$XeF_4$ has total $36$ valence electrons. Select correct for uses of valence electrons in $XeF_4$

Identify the correct statement regarding enzymes

The hybridisations of the atomic orbitals of nitrogen in $\mathrm{NO}_{2}^{-}, \mathrm{NO}^{+} _2$ and $\mathrm{NH}_{4}{ }^{+}$respectively are.

Which of the following alkyl halides give most complex mixture of alkene in an $E_2$ reaction ?

Consider the following reactions :

$(i)$ $F_2 + 2X^-\to 2F^-+ X_2 (X = Cl, Br, I)$

$(ii)$ $Cl_2 + 2X^-\to 2Cl^-+ X_2 (X = Br, I)$

$(iii)$ $I_2 + 2Br^-\to Br_2 + 2I^-$

option which have only the Correct set of reaction is.

Which of the following contains asymmetric centre

Total planes in $CH_4$ which contains maximum number of atoms?

Among the following organic acids, the acid present in rancid butter is