MCQ
An element having the electronic configuration $\left[ {Ar} \right]3{d^2}4{s^2}$ belongs to
  • A
    $s - $ block elements
  • B
    $p -$ block elements
  • $d -$ block elements
  • D
    $f - $ block elements

Answer

Correct option: C.
$d -$ block elements
c
(c) $d-$ block elements as last electron enters in $d-$ orbital.

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

Which of the following is a primary halide
Choose the halogen which is most reactive towards $SN1$ reaction in the given compounds $(A, B, C , D)$
For the cell,

$Mn_{(S)} | Mn^{+2}_{(aq)} (0.4\,M) | | Sn^{+2}_{(aq)} (0.04\,M)| Sn_{(S)}$,

Calculate free energy change $\left( {\Delta G} \right)$ at $298\, K.$ .......... $\mathrm{kJ}$

Given : $E_{M{n^{ + 2}}/Mn}^o =  - 1.18\,V ; \,E_{S{n^{ + 2}}/Sn}^o =  - 0.14\,{\rm{volt}}\,\frac{{2.303RT}}{F}=0.06$

Which of the following is the odd one out
$N{H_3} + {O_2}\xrightarrow[\Delta ]{{Pt}}A + {H_2}O;$ $A + {O_2} \to B;$ $B + {O_2} + {H_2}O \to C$

$A, B$ and $C$ are

A metal complex of coordination number six having three different types of ligands  $a, b$ and $c$ of composition $Ma_2b_2c_2$ can exist in several geometrical  isomeric forms; the total number of such isomers is
Value of $CFSE$, in tetrahedral complex having $3d^4$ configuration of metal ion, surrounded by weak field ligands, will be
The incorrect statements regarding enzymes are:

$(A)$ Enzymes are biocatalysts.

$(B)$ Enzymes are non-specific and can catalyse different kinds of reactions.

$(C)$ Most Enzymes are globular proteins.

$(D)$ Enzyme - oxidase catalyses the hydrolysis of maltose into glucose.

Choose the correct answer from the option given below:

An alcohol with molecular formula $C_5H_{12}O$ does not change the colour of acidic dichromate solution. Identify that alcohol from the following-
The major product of the following reaction is:

$CH _{3} CH _{2} CH = CH _{2}$ $\xrightarrow[{Rh\,\,catalyst}]{{{H_2}/CO}}$