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?
During an experiment, iron nails are placed in copper sulphate solution, and a reddish-brown deposit forms on the nails. What does this observation demonstrate about the type of chemical reaction and the substances involved?
In the reaction Na2SO4(aq) + BaCl2(aq) → BaSO4(*) + 2NaCl(aq), what will be the actual physical state that can replace (*)?
A student mixes aqueous solutions of barium chloride and sodium sulphate. A white curd-like substance forms instantly. What type of chemical reaction is primarily responsible for this observation?
In a laboratory, copper sulphate solution reacts with iron filings, causing a colour change and the deposition of a new metal. Which statement correctly explains the reason for this reaction?
- ________ is not a chemical change.
- 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?
Important Questions from Chemical Reaction
Which of the following statement is/are true?
I. In physical change new substance is formed. substance is formed.
II. In chemical change no new substance is formed.
Which of the following cells involves similar chemical reactions?
The information not obtained from balanced chemical equation is
Oxygen cannot be obtained by which one of the following methods?
Which of the following statement is correct?
I. Insoluble salt is obtained by precipitation reaction.
II. Addition of oxygen or loss of hydrogen is called oxidation.
