MCQ
Correct statement for $3d-$ series is
  • A
    $Sc$ shows stable $+ 3$ oxidation state
  • B
    $Zn$ has maximum $I.E.$
  • C
    Metallic radius of $Mn > Fe$
  • All are correct

Answer

Correct option: D.
All are correct
d

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

Lassaigne's test for nitrogen is negative for which compound ?
$\begin{array}{*{20}{c}}
  {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {Ph - C - OH\xrightarrow[\Delta ]{{N{H_3}}}(A){\mkern 1mu} \xrightarrow[{KOH}]{{B{r_2}}}(B),{\mkern 1mu} } 
\end{array}{\mkern 1mu} {\mkern 1mu}$  product $B$  is
Elements upto atomic number $103$  have been synthesized and studied. If a newly discovered element is found to have an atomic number $106,$  its electronic configuration will be
The relative lowering in vapour pressure of an aqueous solution of urea which is $6\%$ by weight, is
Which of the following is most polar?
$2,{3-}$Dimethyl$-{2-}$butene can be prepared by heating which of the following compounds with a strong acid ?
Which of the following radioisotopes is used as anticancerous ?
$\mathrm{N}_{2} \mathrm{O}_{5(9)} \rightarrow 2 \mathrm{NO}_{2(9)}+\frac{1}{2} \mathrm{O}_{2(\mathrm{~g})}$

In the above first order reaction the initial concentration of $\mathrm{N}_{2} \mathrm{O}_{5}$ is $2.40 \times 10^{-2}\, \mathrm{~mol} \,\mathrm{~L}^{-1}$ at $318 \,K.$ The concentration of $\mathrm{N}_{2} \mathrm{O}_{5}$ after $1\, hour$ was $1.60 \times 10^{-2}\, \mathrm{~mol} \,\mathrm{~L}^{-1}$, The rate constant of the reaction at $318\, \mathrm{~K}$ is $.....\,\times 10^{-3} \mathrm{~min}^{-1}$. (Nearest integer)

[Given: $\log 3=0.477, \log 5=0.699$ ]

For the sequence of reactions, $A\xrightarrow[{ether}]{{{C_2}{H_5}MgI}}B\xrightarrow{{{H_2}O/{H^ + }}}$ tert-Pentyl alcohol. The compound $A$ in-the  sequence is
Which one of the following undergoes nucleophilic aromatic substituion at the fastest rate ?