One of the commonly used electrode is calomel electrode. Under which of the following categories calomel electrode comes ?
- Metal – Insoluble Salt – Anion electrodes
- Oxidation – Reduction electrodes
- Gas – Ion electrodes
- Metal ion – Metal electrodes
The Correct Option is A
Approach Solution - 1
Understanding the Calomel Electrode:
The calomel electrode is commonly used as a reference electrode in electrochemical measurements. It consists of mercury (\( \text{Hg} \)) in contact with mercurous chloride (calomel, \( \text{Hg}_2\text{Cl}_2 \)) in a saturated potassium chloride (\( \text{KCl} \)) solution.
Category of the Calomel Electrode:
The calomel electrode falls under the category of "Metal – Insoluble Salt – Anion electrodes" because it involves a metal (\( \text{Hg} \)), an insoluble salt (\( \text{Hg}_2\text{Cl}_2 \)), and the chloride ions (\( \text{Cl}^- \)) in solution.
Conclusion:
The correct answer is Option (1): Metal – Insoluble Salt – Anion electrodes.
Approach Solution -2
The calomel electrode is commonly used as a reference electrode in electrochemical measurements. It consists of mercury (Hg) in contact with mercurous chloride (Hg\(_2\)Cl\(_2\), called calomel) and a saturated solution of potassium chloride (KCl).
Step 2: Electrode Classification.
Electrodes are classified based on their constitution into several types, including metal-metal ion electrodes, gas electrodes, redox electrodes, metal-metal salt electrodes, amalgam electrodes, and ion-selective electrodes.
The calomel electrode specifically falls under the category of "Metal – Insoluble Salt – Anion electrode". This means:
- It contains a metal (mercury).
- It contains an insoluble salt phase (mercurous chloride, Hg\(_2\)Cl\(_2\)).
- The electrode reaction involves an anion (chloride ion, Cl\(^-\)).
Step 3: Working Principle.
The calomel electrode operates based on the equilibrium:
\[ \text{Hg}_2\text{Cl}_2 (s) + 2 e^- \rightleftharpoons 2 \text{Hg} (l) + 2 \text{Cl}^- \] The potential of the electrode depends on the chloride ion concentration in the solution.
Step 4: Importance and Applications.
Calomel electrodes provide a stable and reproducible reference potential and are widely used in pH measurements, potentiometric titrations, and electrochemical research.
Final Answer:
\[ \boxed{ \text{Metal – Insoluble Salt – Anion electrodes} } \]
Top JEE Main Chemistry Questions
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- At equilibrium the concentrations of and in a sealed vessel at . What will be for the reaction
- Find out the major products from the following reactions
Cobalt chloride when dissolved in water forms pink colored complex $X$ which has octahedral geometry. This solution on treating with cone $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ geometry $X, Y$ and $Z$, respectively, are
- The correct order of atomic radii is:
Top JEE Main coordination compounds Questions
- The hybridization of P exhibited in \(PF_5\) is \(sp_xd_y\). The value of y is _____ .
- In Kjeldahl's method for estimation of nitrogen, \(CuSO_4\) acts as
- Which is homoleptic complex?
- Find the total number of sigma and pi bonds in 2-formyl hex-4-enoic acid.
- Which of the following has maximum ionic character?
Top JEE Main Questions
- Two masses $m$ and $\frac{m}{2}$ are connected at the two ends of a massless rigid rod of length $l$. The rod is suspended by a thin wire of torsional constant $k$ at the centre of mass of the rod-mass system(see figure). Because of torsional constant $k$, the restoring torque is $\tau =k\theta$ for angular displacement $\theta$. If the rod is rota ted by $\theta_0$ and released, the tension in it when it passes through its mean position will be:
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- The value of is
- The number of terms of an is even. The sum of the odd terms is and of the even terms is . The last term exceeds the first by . Then the number of terms in the series is ______.
A black body is at a temperature of 2880 K. The energy of radiation emitted by this body with wavelength between 499 nm and 500 nm is U1, between 999 nm and 1000 nm is U2 and between 1499 nm and 1500 nm is U3. The Wien's constant, b = 2.88×106 nm-K. Then,