Download App

Electrochemistry — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry2 Marks
Question
How will the pH of brine (aq. NaCl solution) be affected when it is electrolysed?
✓

Answer

Aqueous solution of brine contains Na+, CP, H+ and H–. Electrode process are given as follows:
$2\text{H}^++2\text{e}^{-}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ }\text{H}_2\ \ \ \ (\text{cathode})$
$2\text{Cl}^-\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ }\text{Cl}_2+2\text{e}\ \ \ \ (\text{Anode})$
Remaining solution will contain NaOH, which is base, therefore, pH will increase.

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

Explore more

More "2 Marks Questions" from Electrochemistry→Electrochemistry — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

A first order reaction has a rate constant of 0.0051 min–1. If we begin with 0.10 M concentration of the reactant, what concentration of the reactant will be left after 3 hours?
→
Compare the stability of +2 oxidation state for the elements of the first transition series.
→
Answer the following questions.
a-amino acids have relatively higher melting points than the corresponding halo acids. Explain.
→
Arrange the following compound in increasing order of their reactivity in nucleophilic addition reaction.
Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.
→
How the benzaldehyde and acetaldehyde are differentiated?
→
Explain giving reason:
The transition metals generally form coloured compounds.
→
The mixture of ethyl alcohol and cyclohexane shows positive deviation from Raoult's law. Why?
→
Write the name of the cell which is generally used in inverters. Write the reactions taking place at the anode and the cathode of this cell.
→
Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
  1. Both assertion and reason are true and the reason is the correct explanation of assertion.
  2. Both assertion and reason are true and the reason is not the correct explanation of assertion.
  3. Assertion is true but the reason is false.
  4. Both assertion and reason are false.
  5. Assertion is false but reason is true.
Assertion: Conductivity of all electrolytes decreases on dilution.
Reason: On dilution number of ions per unit volume decreases.
→
Arrange the following in order of property indicated for set.
(CH3)2CHCOOH, CH3CH2CH(Br)COOH, CH3CH(Br)CH2COOH (increasing order of their acid strengths).
→