MCQ
What is the conjugate base of $O{H^ - }$
  • A
    ${O_2}$
  • B
    ${H_2}O$
  • C
    ${O^ - }$
  • ${O^{2 - }}$

Answer

Correct option: D.
${O^{2 - }}$
(d) $O{H^ - } \to \mathop {{O^{2 - }} + {H^ + }}\limits_{{\rm{Conjugate}}\,{\rm{base}}\,{\rm{of}}\,O{H^ - }} $

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

Given below are two statements :
Statement I: Nephthalene is an aromatic compound and has
$10 \pi$ electrons.
Statement II : Pyridine is an heterocyclic aromatic compound .
In the light of the above statements, choose the most appropriate answer from the options given below :
Consider the $S_N1$ solvolysis of the following halides in aqueous formic acid :

$(I)$ $\begin{array}{*{20}{c}}  {C{H_3}\,\,\,\,\,\,Br} \\   {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,} \\   {C{H_3} - CH - CH - C{H_3}} \end{array}$

$(II)$ $[Figure\,2]$

$(III)$ $\begin{array}{*{20}{c}}  {{C_6}{H_5} - CH - {C_6}{H_5}} \\   {|\,\,\,} \\   {Br} \end{array}$ 

$(IV)$ $[Figure\,4]$

Which one of the following is correct sequence of the halides given above in the decreasing order of their reactivity ?

Linear structure is assumed by :
$(I) \,NCO^-$             $(II)\, CS_2$          $(III)\, \overset{+}{\mathop{N}}{{O}_{2}}$       $(IV)$ Solid $BeH_2$
Heat of neutralisation of one equivalent of an acid by one equivalent of a base is  minimum when
The wave number of the first Lyman transition in $H$ atom spectrum is equal to the wave number of second balmer transition in the spectrum of
According to werner's theory, Primary valency of central metal ion is
Chemical property of $Li$ and $Mg$ are similar because
$C_7H_9N$ has how many isomeric forms that contain a benzene ring
Among the given compound choose the two that yield same carbocation on ionization.
Product of this reaction is