MCQ
Select the correct option
- A$[Ar]\,\,4s^2\,\,3d^5$ this configuration belongs to $d-$ block
- BMagic No. of $III$ $B$ group is $= 18,\,\,18,\,\,32$
- CIn first transition series total $10$ elements
- ✓All are correct
✓
Answer
Correct option: D.
All are correct
d
$[Ar]\,\,4s^2\,\,3d^5\Rightarrow $ At No. $= 25 (Fe)$ $d-$ Block
$[Ar]\,\,4s^2\,\,3d^5\Rightarrow $ At No. $= 25 (Fe)$ $d-$ Block
$III\,\,B$ magic no. $\Rightarrow \,\,18,\,\,18,\,\,32$
First transition $(3d)\Rightarrow $ At. No. $\Rightarrow $ $21 -30$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What are reactant $X$ and product $Y$ in the following sequence of reactions ?
→Reactant $ X$ Product $Y$
Thermally most stable compound is
Temperature dependent equation can be written as
Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because:
Which one of the following compounds gives carboxylic acid with $HNO_2$ ?
→What reagent and/or reaction conditions would you choose to bring about the
following conversion?
following conversion?
The $2\,N$ aqueous solution of ${H_2}S{O_4}$ contains
→$P_4O_{10}$ has short and long $P-O$ bonds. The number of short $(P-O)$ bonds in this compound
→The long hydrocarbon chain in soap is water $-$ repelling $($hydrophobic$),$ which is called:
→Electrolytic reduction of alumina to aluminium by Hall$-$Heroult's process is carried out $........$
→