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2 Marks
Consequence of Non-Oxidation:
- Challenge in Detection: Without oxidation, identifying copper and iron ions in experiments would become challenging.
- Impact on Applications: Various applications and analyses that depend on redox reactions involving these metals would be significantly affected.
VSAQ-2 : What are the essential conditions that iron articles get rust?
Essential Conditions for Rusting of Iron Articles
- Presence of Water: Moisture or water is crucial for the rusting process.
- Oxygen from Air: Oxygen in the air reacts with iron in the presence of water to form rust.
VSAQ-3 : What are the preventive methods do you take for rusting of iron materials?
Preventive Measures for Rusting of Iron Materials
- Painting:
- Objective: Create a barrier between the metal and the environment.
- Method: Apply protective paint or coating on the iron surface to prevent exposure to moisture and oxygen.
- Electroplating:
- Objective: Add a layer of protection to the iron.
- Method: Coat iron materials with non-rusting metals like tin or zinc through electroplating to inhibit rust.
- Oiling and Greasing:
- Objective: Protect the iron surface from environmental elements.
- Method: Regular application of oils or greases to form a protective film, blocking moisture and oxygen contact.
- Gold (Au): Naturally occurs in its pure, elemental state.
- Silver (Ag): Found in native form, not combined with other elements.
- Copper (Cu): Exists in nature as a free metal.
What is Activity Series?
- Definition: The activity series is a list of metals arranged according to their reactivity, from most reactive to least reactive.
- Function: It indicates how readily each metal can undergo oxidation (lose electrons).
- Guide for Extraction Methods: The series helps determine the most effective extraction method for a metal, based on its position in the series.
- Reactivity Consideration: Metals higher in the series are more reactive and can displace less reactive metals from their compounds.
- Selection of Reducing Agents: The reactivity of a metal guides the choice of reducing agents in processes like smelting or chemical reduction.
VSAQ-6 : What are minerals?
- Naturally Occurring: Minerals are substances that occur naturally in the Earth’s crust.
- Inorganic Origin: They are inorganic, meaning they are not formed by living organisms.
- Composition: Minerals can be single elements or compounds.
- Structure: They often possess a distinct crystalline structure.
- Example: Iron (Fe) is an example of a mineral that is a metal found in various forms in the Earth’s crust.
- Process Description: Refining of metal is the process of purifying an impure metal.
- Objective: Aimed at obtaining a pure and high-quality metal with minimal impurities.
- Techniques Used: Various techniques are employed, such as electrolysis, fractional crystallization, or chemical processes.
- Purpose: The goal is to remove unwanted substances and achieve the desired purity level for the final metal product.