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?
When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. This process is called:
When Barium Chloride (BaCl2) solution is mixed with Sodium Sulfate (Na2SO4) solution, a white product Barium Sulfate (BaSO4) is formed. This product is known as a ______.
Which of the following statements about carbon monoxide in the air is correct?
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?
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?
In the reaction Na2SO4(aq) + BaCl2(aq) → BaSO4(*) + 2NaCl(aq), what will be the actual physical state that can replace (*)?
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 is the most reactive metal?
