Download App

Electrochemistry — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry1 Mark
Question
Why does a galvanic cell become dead after some time?
✓

Answer

As the reaction proceeds, concentration of ions in anodic half keeps on increasing while in the cathodic half it keeps on decreasing. Hence, their electrode potentials also keep on changing till ultimately they become equal and then e.m.f. of the cell becomes zero.

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 "1 Marks Question" from Electrochemistry→Electrochemistry — all question types→Chemistry STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Use Hund’s rule to derive the electronic configuration of Ce3+ ion, and calculate its magnetic moment on the basis of ‘spin-only’ formula.
→
Why does vapour pressure of a liquid decrease with addition of non-volatile solid solute?
→
A coordination compound with the molecular formula CrCl3.4H2O precipitates AgCl with AgNO3 solution. Its molar conductivity is found to be equivalent to two ions. What is the structural formula and name of the compound?
[Co(NH3)3Cl3], [Co(NH3)5Cl]Cl2 , [Co(NH3)6]Cl3 , [Co(NH3)4Cl2]Cl
→
Using IUPAC norms write the formula for the following:
Hexaamminecobalt (III) sulphate.
→
What type of bonding helps in stabilising the $\alpha$-helix structure of proteins?
→
Suggest a reagent for conversion of ethanol to ethanoic acid.
→
Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines.
(CH3)3CNH2
→
In a reaction the energy of a sufficient number of molecules colliding is more than the threshold energy, yet the rate of the reaction is low, why?
→
Write short notes on the following:
Coupling reaction
→
Structures of glycine and alanine are given below. Show the peptide linkage in glycylalanine.
$\text{H}_{2}\text{N}-\text{CH}_{2}-\text{COOH} :\text{H}_2\text{N}-\text{CH}_2-\text{COOH}\\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$
→