MCQ
$pH$ of a solution is $ 5$ . Its hydroxyl ion concentration is
- A$5$
- B$10$
- C${10^{ - 5}}$
- ✓${10^{ - 9}}$
✓
Answer
Correct option: D.
${10^{ - 9}}$
(d) $pH = 5\,\,{\rm{means}}\,\,[{H^ + }] = {10^{ - 5}}$
$pOH = 14 - pH = 14 - 5 = 9$
$[O{H^ - }] = {10^{ - pOH}} = {10^{ - 9}}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following species contains equal number of $\sigma -$ and $\pi -$ bonds ?
→On the basis of the information available from the reaction $\frac{4}{3}Al + {O_2} \to \frac{2}{3}A{l_2}{O_3},\Delta G = - 827\,\,kJ\,mo{l^{ - 1}}$ of ${O_2}$, the minimum emf required to carry out an electrolysis of $A{l_2}{O_3}$ is $(F = 96500\,C \,mo{l^{ - 1}})$ ................ $\mathrm{V}$
→In which of the following compounds nitrogen exhibits highest oxidation state ?
$AlCl_3$ on hydrolysis gives:
→Which of the following is invert sugar
Reaction of primary amines with aldehyde yields
The equilibrium constant for the reaction
→$SO_3(g) \rightleftharpoons SO_2(g)+ \frac{1}{2} O_2(g)$
is $K_c= 4.9 \times 10^{-2}.$ The value of $K_c$ for the reaction
$2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)$
will be
$B$ is
→Which of the following has peroxy linkage ?
The cell reaction $Mn + 2Ag_{\left( {{C_1}} \right)}^ + \left( {aq} \right) \to Mn_{\left( {{C_2}} \right)}^{ + 2}\left( {aq} \right) + 2Ag$ is represented by
→