Chemistry · 2021
JEE Main · 27 July 2021, Shift 1 · Q56
The conductivity of a weak acid HA of concentration 0.001 mol L^-1 is 2.0 × 10^-5 Scm^-1. If Λ_m^°( HA )=190 Scm^2 mol^-1, the ionization constant (…
The conductivity of a weak acid HA of concentration $\displaystyle 0.001 \mathrm{~mol} \mathrm{~L}^{-1}$ is $\displaystyle 2.0 \times 10^{-5} \mathrm{Scm}^{-1}$. If $\displaystyle \Lambda_{\mathrm{m}}^{\circ}(\mathrm{HA})=190 \mathrm{Scm}^2 \mathrm{~mol}^{-1}$, the ionization constant $\displaystyle \left(\mathrm{K}_{\mathrm{a}}\right)$ of HA is equal to
\_\_\_\_ $\displaystyle \times 10^{-6}$. (Round off to the Nearest Integer)
Official answer
12
More from Electrochemistry
- The E^° (volt) values are: Al^3+ / Al,-1.66, Sc^3+ / Sc,-2.08, Fe^3+ / Fe^2+, +0.77, Hg_2^2+ / Hg,+0.79. Arrangement of cations, Al^3+, Sc^3+, Fe^3+…2022
- In which of the following half cells, electrochemical reaction is pH dependent?2022
- At 298 K, a 1 litre solution containing 10 mmol of Cr_2 O_7^2- and 100 mmol of Cr^3+ shows a pH of 3.0. Given: Cr_2 O_7^2- → Cr^3+; E^°=1.330 V and…2023
- The product, which is not obtained during the electrolysis of brine solution is2023
- The solubility product of a sparingly soluble salt A_2 X_3 is 1.1 × 10^-23. If specific conductance of the solution is 3 × 10^-5 S m^-1, the limiting…2022
- The Gibbs energy change (in J) for the given reaction at [Cu^2+]=[Sn^2+]=1 M and 298 K is: Cu( s)+Sn^2+(aq.) → Cu^2+(aq.)+Sn( s); (E_Sn^2+ ∣…2020
- Resistance of a conductivity cell (cell constant 129 m^-1 ) filled with 74.5 ppm solution of KCl is 100 Ω (labelled as solution 1). When the same…2022
- For lead storage battery pick the correct statements A. During charging of battery, PbSO_4 on anode is converted into PbO_2 B. During charging of…2023
JEE Main 2021 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.