Advertisements
Advertisements
प्रश्न
Write a chemical equation to show the process of corrosion of iron.
Advertisements
उत्तर
\[\ce{\underset{Iron}{4Fe} + \underset{Oxygen}{3O2} + \underset{Water}{2xH2O} -> \underset{(Rust)}{\underset{Hydrated iron oxide}{2Fe2O3 * xH2O}}}\]
APPEARS IN
संबंधित प्रश्न
Write two methods of preventing the rusting of iron.
Which metals do not corrode easily?
What is anodising? Give its applications.
What special name is given to the corrosion of iron?
Name two metals which resist corrosion due to the formation of a thin, hard and impervious layer of oxide on their surface.
Bronze is an alloy of ______.
Name the metal which is a constituent of blood pigment?
Write scientific reasons.
Lemon or tamarind is used for cleaning copper vessels turned greenish.
Answer the following question.
a) What is meant by corrosion?
b) Write names of any two methods of prevention of corrosion.
c) In which method, metal like copper, aluminium are coated with a thin layer of their oxides by means of electrolysis.
d) Explain this method with diagram.
Answer the following question:
What is corrosion? Do gold ornaments corrode? Justify.
Give reason.
An iron article should be given a coat of paint
Observe the following picture and answer the following questions:

- What is rust?
- Write the chemical formula of rust.
- Write the reaction of oxidation of iron at the anode.
- Write the reaction of oxidation of iron at the cathode.
- What is corrosion?
_______ is an alloy made from iron, carbon and chromium.
Pressure cooker : Anodizing : : Silver plated spoons : _______
Bronze : _______ : : Stainless steel : Fe + Cr + C
Find the odd one out and give its explanation.
Write scientific reason.
Coins are made from metals and alloys.
What is rust?
Which among the following alloys contain mercury as one of its constituents?
Describe two changes that are harmful. Explain why you consider them harmful. How can you prevent them?
