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प्रश्न
What is passive iron?
उत्तर
Iron, which cannot be easily acted upon by acids, is called as passive iron. Galvanized iron is called passive iron since the coating of zinc protects the iron from corrosion, as zinc is more electropositive and so would be attacked first.
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संबंधित प्रश्न
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Name three other metals which are extracted in a manner similar to sodium.
How is aluminium metal extracted? Explain with the help of an equation.
State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.
Give the chemical formula of :
Bauxite
Explain the following:
Galvanization protects iron from rusting.
What is galvanized iron.
Complete flow chart given below.
Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
- What is reactivity series?
- What will happen when iron nails are dipped in silver nitrate solution?
- Which type of reaction happens when iron metal reacts with silver nitrate solution?
- What will happen if a zinc rod is used instead of iron nail?
Explain in brief types of extraction of moderately reactive metals according to their reactivity.
