Download App

Redox Reactions — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryRedox Reactions2 Marks
Question
  1. Define the term redox couple. Write the practical application of redox couple.
  2. Split $2\text{K}\text{(s)}+\text{Cl}_2\text{(g)}\xrightarrow{ \ \ \ \ \ }2\text{KCl}\text{(s)}$ into oxidation and reducton half reaction.
✓

Answer

  1. Redox couple. It is defined as having together the oxidised and reduced forms of a substance taking part in an oxidation or reduction half reaction e.g. $\frac{\text{Zn}^{2+}}{\text{Zn}}$ and $\frac{\text{Cu}^{2+}}{\text{Cu}}$ form a redoxc couple. application. These are used to make electrochemical cell.
  2. $2\text{K}\xrightarrow{ \ \ \ \ }2\text{K}^++2\text{e}^-$ (oxidation half reaction)
$\text{Cl}_2+2\text{e}^-\xrightarrow{ \ \ \ \ }2\text{Cl}^-$ (reduction half reaction)

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 Redox Reactions→Redox Reactions — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

What would be IUPAC names and symbols for elements with atomic numbers 122, 127, 135, 149 and 150?
→
What happens when:
  1. Sodium metal is dropped in water.
  2. Sodium metal is dissolved in liquid ammonia.
→
Permanganate ion reacts with bromide ion in basic medium to give manganese dioxide and bromate ion. Write the balanced chemical equation for the reaction.
→
Arrange
a. $\mathrm{RbH}, \mathrm{CH}, \mathrm{LiH}, \mathrm{KH}$, in increasing order of ionic character.
b. $\mathrm{H}_2 \mathrm{O}_2, \mathrm{O}_3, \mathrm{O}_2$ in increasing order or bond length of $\mathrm{O}-\mathrm{O}$ bond.
→
Write two important methods of formation of benzene.
→
What is the basic difference between the terms electron gain enthalpy and electronegativity?
→
In an experiment, when hydrochloric acid was reacted with $\mathrm{CaCO}_3$ at STP, $48 \mathrm{~cm}^3$ of $\mathrm{CO}_2$ was formed. Calculate the number of mole of $\mathrm{CO}_2$ and number of molecules.
→
Justify that the following reactions are redox reactions:CuO(s) $+ H _2(g) \rightarrow Cu ( s )+ H _2 O ( g )$
→
Explain the following:
$\mathrm{PbX}_2$ is more stable than $\mathrm{PbX}_4$.
→
Write IUPAC names of the following compound: $\text{CH}_3(\text{CH}_2)_4\text{CH}(\text{CH}_2)_3\text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_2-\text{CH}(\text{CH}_3)_2$
→