Corrosion: Chemical Process Explained
Corrosion is a natural process where a substance, typically a metal, deteriorates due to chemical reactions with its environment. This involves the gradual breakdown of the material.
Common Examples of Corrosion
- Copper develops a green or bluish layer, known as patina or plaque, when exposed to air and moisture. This is an oxidation process.
- Iron undergoes rusting, forming a reddish-brown layer of iron oxides when it reacts with oxygen and water.
- Silver turns black (tarnishes) due to a reaction with sulfur compounds in the atmosphere, forming silver sulfide.
All these phenomena are specific instances of corrosion.
Analyzing the Options
Let's review the given options:
- Flocculation: A process of particle aggregation in liquids.
- Extrusion: A manufacturing process used to create objects with a fixed cross-sectional profile.
- Corrosion: The chemical or electrochemical degradation of a material. This matches the described phenomena.
- Encapsulation: The process of enclosing something within another substance.
The chemical process that results in plaque on copper, the rusting of iron, and the blackening of silver is corrosion.
Similar Questions
- What is oxidization?
- With which substance does silver react and turn black?
- Which of the following determines that a chemical reaction has not taken place?
- Which of the following solutions has the highest concentration of hydrogen ions?
- Which of the following product is formed due to burning of a magnesium ribbon with a spirit lamp?
- Decomposition of calcium carbonate to calcium oxide and carbon dioxide on heating is an example of ____.
- ________ is not a chemical change.
During the electrolysis of water, hydrogen and oxygen are released in which ratio?
When dilute Hydrochloric acid (HCl) reacts with Sodium Hydrogen Carbonate (NaHCO3), which is the product formed along with Sodium chloride (NaCl) and Water (H2O)?
Which metal reacts violently with cold water, producing a metal hydroxide, hydrogen gas, and enough heat for the hydrogen to catch fire?
Important Questions from Chemical Reaction
- Which one of the following is not an example of a redox reaction?
- Which one of the following is not a pigment?
- Which one of the following reactions is an example of decomposition reaction?
Match List I with List II and select the correct answer using the code given below the Lists:
LIST I
(Chemical process)
LIST II
(Reaction)
A.
Electrolysis of water
1.
Double displacement
reactionB.
Burning of coal
2.
Combination reaction
C.
Iron nail immersed in copper sulphate solution
3.
Decomposition reaction
D.
Addition of barium chloride solution to aluminium sulphate solution
4.
Displacement reaction
Consider the following reaction:
Fe2O3(s) + 2Al(s) → 2Fe(s) + Al2O3(s)
Which of the following statements about the given reaction is NOT correct?
