MCQ
Which is not paramagnetic
  • A
    ${O_2}$
  • B
    $O_2^ + $
  • $O_2^{2 - }$
  • D
    $O_2^ - $

Answer

Correct option: C.
$O_2^{2 - }$
(c) $O_2^{2 - }$ does not have any unpaired electron so it is diamagnetic.

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

Amongst the following element with their electronic configuration given below, which one is having highest ionisation energy ?
$\begin{array}{*{20}{c}}
  {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {Et - {\text{ }}O - {\text{ }}C - {\text{ }}O - {\text{ }}Et\xrightarrow[{(2){H_3}{O^ \oplus }}]{{\left( 1 \right){\text{ }}C{H_3}MgBr\,\,\left( {excess} \right)}}(A),} 
\end{array}$

 Product $(A)$ is 

What is the work done when $1\, mole$ of a gas expands isothermally and reversibly from $25\, L$ to $250\, L$ at a temperature of $300\, K$?....$J$
The shape of $SO_4^{2 - }$ ion is
$\mathop {{C_4}{H_7}OCl}\limits_{\left( x \right)} \,\xrightarrow{{N{H_3}}}{C_4}{H_9}ONH_2\xrightarrow{{B{r_2} + KOH}}C{H_3} - C{H_2} - C{H_2} - N{H_2}$ Compound $x$ is
In collision theory of chemical reaction, $Z_{\text {AB }}$ represents
Match the following:
Column $I$ Column $II$
$(A)$ $\mathrm{Bi}^{3+} \longrightarrow(\mathrm{BiO})^{+}$ $(P)$ Heat
$(B)$ $\left[\mathrm{AlO}_2\right]^{-} \longrightarrow \mathrm{Al}(\mathrm{OH})_3$ $(Q)$ Hydrolysis
$(C)$ $\mathrm{SiO}_4^{4-} \longrightarrow \mathrm{Si}_2 \mathrm{O}_7^{6-}$ $(R)$ Acidification
$(D)$ $\left(\mathrm{B}_4 \mathrm{O}_7^{2-}\right) \longrightarrow\left[\mathrm{B}(\mathrm{OH})_3\right]$ $(S)$ Dilution by water
If $E.A.N.$ of central metal cation $M^{2+}$ in a non-chelating complex is $36$  and  atomic no. of metal $M$ is $26$, then the number of monodentate ligand is in  this complex are
Acetylene can be prepared from
Which of the following statements are correct?

$(A)$ The $M ^{3+} / M ^{2+}$ reduction potential for iron is greater than manganese

$(B)$ The higher oxidation states of first row $d$ block elements get stabilized by oxide ion.

$(C)$ Aqueous solution of $Cr ^{2+}$ can liberate hydrogen from dilute acid.

$(D)$ Magnetic moment of $V ^{2+}$ is observed between $4.4-5.2\,BM$

Choose the correct answer from the options given below: