The most convenient method to protect the bottom of ship made of iron is
- Coating it with Red lead oxide
- White tin plating
- Connecting it with Mg block
- Connecting it with Pb block
The Correct Option is C
Solution and Explanation
Top Questions on Electrochemistry
Standard electrode potential for \( \text{Sn}^{4+}/\text{Sn}^{2+} \) couple is +0.15 V and that for the \( \text{Cr}^{3+}/\text{Cr} \) couple is -0.74 V. The two couples in their standard states are connected to make a cell. The cell potential will be:
To calculate the cell potential (\( E^\circ_{\text{cell}} \)), we use the standard electrode potentials of the given redox couples.
Given data:
\( E^\circ_{\text{Sn}^{4+}/\text{Sn}^{2+}} = +0.15V \)
\( E^\circ_{\text{Cr}^{3+}/\text{Cr}} = -0.74V \)- CBSE CLASS XII - 2025
- Chemistry
- Electrochemistry
- (a) Write the cell reaction and calculate the e.m.f. of the following cell at 298 K: \[ \text{Sn}(s) \mid \text{Sn}^{2+} (\text{0.004 M}) \parallel \text{H}^+ (\text{0.02 M}) \mid \text{H}_2 (\text{1 Bar}) \mid \text{Pt}(s) \] (Given: \( E^\circ_{\text{Sn}^{2+}/\text{Sn}} = -0.14 \, \text{V}, E^\circ_{\text{H}^+/\text{H}_2} = 0.00 \, \text{V} \)) \vspace{5pt}
- CBSE CLASS XII - 2025
- Chemistry
- Electrochemistry
(a.)Write the anode and cathode reactions and the overall cell reaction occurring in a lead storage battery during its use.
- CBSE CLASS XII - 2025
- Chemistry
- Electrochemistry
- The charge required for the reduction of 1 mol of \( MnO_4^- \) to \( MnO_2 \) is
- CBSE CLASS XII - 2025
- Chemistry
- Electrochemistry
- Calculate \( \Lambda_m^0 \) for acetic acid and its degree of dissociation (\( \alpha \)) if its molar conductivity is 48.1 \( \Omega^{-1} \, \text{cm}^2 \, \text{mol}^{-1} \).
Given that
\( \Lambda_m^0 (\text{HC}) = 426 \, \Omega^{-1} \, \text{cm}^2 \, \text{mol}^{-1} \),
\( \Lambda_m^0 (\text{NaCl}) = 126 \, \Omega^{-1} \, \text{cm}^2 \, \text{mol}^{-1} \),
\( \Lambda_m^0 (\text{CH}_3\text{COONa}) = 91 \, \Omega^{-1} \, \text{cm}^2 \, \text{mol}^{-1} \).- CBSE CLASS XII - 2025
- Chemistry
- Electrochemistry
Questions Asked in NEET exam
- A wire of length and resistance \(100\) is divided into 10 equal parts. The first \(5\) parts are connected in series while the next \(5\) parts are connected in parallel. The two combinations are again connected in series. The resistance of this final combination is:
- NEET (UG) - 2024
- Resistance and Resistivity
- In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is 100x (kcal m-2)yr-1, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
- NEET (UG) - 2024
- Ecosystems
- A light ray enters through a right angled prism at point P with the angle of incidence 30° as shown in figure. It travels through the prism parallel to its base BC and emerges along the face AC. The refractive index of the prism is :
- NEET (UG) - 2024
- Refraction Through A Prism
- Match List I with List II:Choose the correct answer from the options given below:
List I
List II
A Mesozoic Era I Lower invertebrates B Proterozoic Era II Fish & Amphibia C Cenozoic Era III Birds & Reptiles D Paleozoic Era IV Mammals - NEET (UG) - 2024
- Origin Of Life
- \(^{290}_{82}X\stackrel{\alpha}{\rightarrow}Y\stackrel{e^+}{\rightarrow}Z\stackrel{\beta^-}{\rightarrow}P\stackrel{e^-}{\rightarrow}Q\)
In the nuclear emission stated above, the mass number and atomic number of the product Q respectively, are :- NEET (UG) - 2024
- Nuclear physics
Concepts Used:
Corrosion
Corrosion is a natural process that occurs when metal is exposed to the environment. It is the gradual destruction of metal through chemical reactions with the environment. The most common form of corrosion is the rusting of iron and steel, but other metals can corrode as well.
The corrosion process is influenced by several factors, including the type of metal, the environment, and the presence of oxygen, water, and other chemicals. The corrosion process can result in the loss of structural integrity and aesthetic appeal of metal objects.
There are several types of corrosion, including:
- Uniform corrosion: This is a type of corrosion that occurs uniformly over the surface of the metal.
- Pitting corrosion: This is a localized form of corrosion that creates small pits on the surface of the metal.
- Galvanic corrosion: This is a type of corrosion that occurs when two dissimilar metals are in contact with each other in the presence of an electrolyte.
- Crevice corrosion: This is a type of corrosion that occurs in narrow crevices, such as between two metal surfaces.
To prevent corrosion, various measures can be taken, including the use of corrosion-resistant metals and coatings, the removal of corrosive agents from the environment, and the use of cathodic protection.
Overall, corrosion is an important issue that can have significant economic and safety consequences. Understanding the causes and prevention of corrosion is essential for preserving the integrity and longevity of metal objects.