MCQ
The electronic configuration $1{s^2},2{s^2}{p^6},3{s^2}{p^6}{d^6}$ corresponds to
  • A
    $M{n^{2 + }}$
  • $F{e^{2 + }}$
  • C
    $Co$
  • D
    $Ge$

Answer

Correct option: B.
$F{e^{2 + }}$
b
(b)$F{e^{2 + }} - 1{s^2}2{s^2}{p^6}3{s^2}{p^6}{d^6}$.

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

Similar questions

At $345\, K$, the half life for the decomposition of a sample of a gaseous compound initially at $55.5\, kPa$ was $340\, s$. When the pressure was $27.8 \,kPa$, the half life was fund to be $170\, s$. The order of the reaction is $......$ [integer answer]
The rise in the boiling point of a solution containing $1.8\,gram$ of glucose in $100\,g$ of a solvent in ${0.1\,^o}C$. The molal elevation constant of the liquid is ..........  $K/m$.
Match List $I$ with List $II$.

List $I$ (Conversion)

List $II$ (Number of Faraday required)
$A$. $1 \mathrm{~mol}$ of $\mathrm{H}_2 \mathrm{O}$ to $\mathrm{O}_2$ $l$. $3 \mathrm{~F}$
$B$. $1 \mathrm{~mol}$ of $\mathrm{MnO}_4^{-}$to $\mathrm{Mn}^{2+}$ $II$. $2 F$
$C$. $1.5 \mathrm{~mol}$ of $\mathrm{Ca}$ from molten $\mathrm{CaCl}_2$ $III$. $1F$
$D$. $1 \mathrm{~mol}$ of $\mathrm{FeO}$ to $\mathrm{Fe}_2 \mathrm{O}_3$ $IV$. $5 \mathrm{~F}$

Choose the correct answer from the options given below:

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous  $NaOH $ gives
Which of the following are secondary bromides?
$\ce{(CH_3)_2CHBr}$
$\ce{(CH_3)_3C CH_2Br}$
$\ce{CH_3CH(Br)CH_2CH_3}$
$\ce{(CH_3)_2CBrCH_2CH_3}$
Which among the following will be named as dibromidobis (ethylene diamine) chromium $(III)$ bromide ?
Ethylene glycol reacts with excess of $PC{l_5}$ to give
On mixing, heptane and octane form an ideal solution. At $373\, K,$ the vapour pressures of the two liquid components (heptane and octane) are $105\, kPa$ and $45\, kPa$ respectively. Vapour pressure of the solution obtained by mixing $25.0\, g$ of heptane and $35\, g$ of octane will be ........ $kPa$.

(molar mass of heptane $= 100\, g\, mol^{-1}$ and of octane $= 114\, g\,mol^{-1}$)

Acetaldehyde reacts with ${C_2}{H_5}MgCl$ the final product is
Identify the correct order of reactivity for the following pairs towards the respective mechanism

Choose the correct answer from the options given below: