MCQ
The elements belonging to the first transition series have atomic number from
  • A
    $19$ to $ 37$
  • B
    $22$  to $32$
  • C
    $24$ to $30$
  • $21$  to $30$

Answer

Correct option: D.
$21$  to $30$
d
It’s Obvious.
 

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

$\begin{array}{*{20}{c}}
  {\,\,C{H_{3\,\,\,}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3} - C = C{H_2}\xrightarrow[{{R_2}{O_2}}]{{HBr}}X\xrightarrow{{C{H_3}ONa}}Y\,;} 
\end{array}$

$X$ and $Y$ are

Physical adsorption is appreciable at $.......$ temperature.
Arrange the following solutions in order of decreasing freezing points

$(a)\,0.075\,\,M\,CuS{O_4}$                 $(b)\,0.060\,\,M\,(NH_4)_2SO_4$

$(c)\,0.14\,\,M\,urea$                         $(d)\,0.04\,M\,MgCl_2$

Which compound is formed when excess of $KCN$ is added to aqueous solution of copper sulphate ?
In a first-order reaction of the type : $A(g) \to 2B(g)$, the initial and at time $'t'$ pressures are $p_1$ and $p$ respectively. The rate constant can be expressed by
Which of the following has the maximum number of unpaired $d-$ electrons
$75\% $ of a first order reaction is completed in $30$  minutes. What is the time required for $93.75\%$ of the reaction (in minutes)
Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them
The observed osmotic pressure for a $0.10\, M$ solution of $Fe(NH_4)_2(SO_4)_2$ at $25\,^oC$ is $10.8\, atm$. The expected and experimental ( observed) values of van't Hoff factor $(i)$ will be respectively: $(R\,= 0.082\, L\, atm\, k^{-1}\, mol^{-1})$
Expression representing the cell potential $(E\,\,cell)$