On electrolysis of aqueous solution of KI in | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) During the electrolysis of aqueous $KI$ solution,the following reactions occur:At cathode: $2H_2O(l) + 2e^- \rightarrow H_2(g) + 2OH^-(aq)$. Thus,

Vedclass · Accepted Answer

$a, c$

Vedclass · Answer

(C) During the electrolysis of aqueous $KI$ solution,the following reactions occur:At cathode: $2H_2O(l) + 2e^- \rightarrow H_2(g) + 2OH^-(aq)$. Thus,$H_2$ gas is released at the cathode.At anode: $2I^-(aq) \rightarrow I_2(s) + 2e^-$. Thus,$I_2$ is formed at the anode,not $O_2$.Since $OH^-$ ions are produced at the cathode,the concentration of $OH^-$ increases,which means the $pH$ of the solution increases and the $pOH$ of the solution decreases.Therefore,statements $(a)$ and $(c)$ are correct.

On electrolysis of aqueous solution of $KI$ in presence of platinum electrodes,which of the following statements are correct?
$(a)$ Hydrogen gas is released at cathode
$(b)$ Oxygen gas is released at anode
$(c)$ $pOH$ of solution decreases
$(d)$ There is deposition of potassium at cathode

Similar Questions

We have two spheres,one of which is hollow and the other solid. They have identical masses and moments of inertia about their respective diameters. The ratio of their radii is given by:

The potential difference $V$ and the current $i$ flowing through an instrument in an $ac$ circuit of frequency $f$ are given by $V = 5 \cos \omega t \text{ volts}$ and $i = 2 \sin \omega t \text{ amperes}$ (where $\omega = 2\pi f$). The power dissipated in the instrument is....$W$

$A$ coil of wire of radius $r$ has $600$ turns and a self-inductance of $108 \ mH$. The self-inductance of a coil with the same radius and $500$ turns is (in $mH$)

The condition that $f(x)=a x^3+b x^2+c x+d$ has no extreme value,is

The classification of organisms into prokaryotes and eukaryotes is based on which characteristic?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

On electrolysis of aqueous solution of $KI$ in presence of platinum electrodes,which of the following statements are correct?$(a)$ Hydrogen gas is released at cathode$(b)$ Oxygen gas is released at anode$(c)$ $pOH$ of solution decreases$(d)$ There is deposition of potassium at cathode