COMEDK · Chemistry · 8. Ionic Equilibrium
\(\mathrm{pH}\) of \(10^{-3} \mathrm{M}\) solution of \(\mathrm{KOH}\) is.
- A 7.01
- B 2
- C 11
- D 9
Answer & Solution
Correct Answer
(C) 11
Step-by-step Solution
Detailed explanation
As \(\mathrm{KOH}\) is a base. \[ \begin{aligned} & \mathrm{pOH}=-\log \left[\mathrm{OH}^{-}\right] \\ & \mathrm{pOH}=-\log \left[10^{-3}\right]=3 \\ & \mathrm{pH}+\mathrm{pOH}=14 \\ & \mathrm{p}_{\mathrm{H}}=14-3=11 \end{aligned} \]
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- What is the reduction potential of a half-cell consisting of a Pt electrode dipped in \(2.2 \mathrm{M} \mathrm{Fe}^{2+}\) and \(0.04 \mathrm{M} \mathrm{Fe}^{3+}\) solution where the reaction taking place is conversion of \(\mathrm{Fe}^{3+}\) ions to \(\mathrm{Fe}^{2+}\) ?
\(\mathrm{E}^0\left(\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}\right)=0.771 \mathrm{~V}\)COMEDK 2025 Medium - Solubility product of a salt \(A B\) is \(1 \times 10^{-8} \mathrm{M}^{2}\) in a solution in which the concentration of \(A^{+}\)ions is \(10^{-3} \mathrm{M}\). The salt will precipitate when the concentration of \(B^{-}\)ions is keptCOMEDK 2018 Medium
- Which is the most easily liquefiable rare gas?COMEDK 2017 Medium
- Which one of the following coordination entity is chiral?COMEDK 2015 Hard
- Identify the two incorrect electrochemical reactions shown as taking place in the given cells at the respective electrodes.
Cell Electrode Reaction Lead-Storage Cell Cathode \(Pb + 2SO_4^{2-} + 4H^+ + 2e^- \to PbSO_4 + 2H_2O + SO_2\) Leclanche Cell Cathode \(MnO_2 + NH_4^+ + 2e^- \to MnO + OH + NH_3\) Mercury Cell Anode \(Zn/Hg + 2OH^- \to ZnO(s) + H_2O + 2e^-\) Fuel Cell Cathode \(O_2(g) + 2H_2O + 4e^- \to 4OH^-\) COMEDK 2025 Medium - The formula of chromyl chloride isCOMEDK 2019 Medium
More PYQs from COMEDK
- The angle between the lines \(\frac{x-2}{3}=\frac{y-1}{1}=\frac{z+3}{-1}\) and \(\frac{x+1}{2}=\frac{y-1}{-1}=\frac{z}{2}\) isCOMEDK 2024 Easy
- Consider two skew lines in 3D space.
\(M_1: \dfrac{x-1}{1} = \dfrac{2-y}{1} = \dfrac{z-5}{1}\) and \(M_2: \dfrac{x+3}{1} = \dfrac{y-7}{2} = \dfrac{z+4}{1}\)
Let \(L_1\) be the line of shortest distance (common perpendicular) between \(M_1\) and \(M_2\)
If \(L_2\) is a line parallel to the vector \(\vec{b} = \hat{j} + \hat{k}\),
Then the acute angle \(\theta\) between the lines \(L_1\) and \(L_2\) is:COMEDK 2026 Medium - If \(A=\left[\begin{array}{lll}a & 0 & 0 \\ 0 & a & 0 \\ 0 & 0 & a\end{array}\right]\), then \(\operatorname{det}(\operatorname{adj} A)\) isCOMEDK 2015 Easy
- \(\mathrm{N}_2 \mathrm{O}_5\) decomposes to \(\mathrm{NO}_2\) and \(\mathrm{O}_2\) and follow first order kinetics. After 50 minutes, the pressure inside the vessel increases from 50 mm Hg to 87.5 mm Hg. The pressure of the gaseous mixture after 100 minutes at constant temperature will be [Nearest integer]COMEDK 2024 Hard
- When a nitrogen-14 nucleus is bombarded by a deuteron, the products formed are:COMEDK 2025 Medium
- The angle between hands of a clock when the time is \(4.25 \mathrm{AM}\) is signed toCOMEDK 2018 Easy