4 Questions
What is corrosion?
Corrosion is the spontaneous destruction and consequent loss of a metal/alloy due to unavoidable chemical/electrochemical attack by the environment.
How do metals exist in nature?
Many metals exist in nature in combined form as their oxides, carbonates, sulphides, chlorides, and silicates (except noble metals) such as Au (gold), Pt (Platinum) etc.
Why is considerable amount of energy required during the extraction of ores?
Considerable amount of energy is required during the extraction of ores because compounds are in a lower energy state than the metals, so the metals need to be reduced to their metallic state from their ores.
What causes the decay of exposed metal surfaces?
When metals are put into use in various forms and get exposed to the environment such as dry gases, moisture, liquids etc., the exposed metal surfaces begin to decay by conversion into a compound.
Test your knowledge about corrosion and the extraction of metals from ores with this quiz. Learn about the spontaneous destruction of metals due to chemical attack by the environment and the energy-intensive process of extracting metals from their ores.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
