English
Maharashtra State BoardSSC (English Medium) 10th Standard

Write scientific reason. Anodization method is useful for prevention of the corrosion of the aluminium. - Science and Technology 1

Advertisements
Advertisements

Question

Write scientific reason.

Anodization method is useful for prevention of the corrosion of the aluminium.

Answer in Brief
Explain
Advertisements

Solution

  1. The process of coating metals such as aluminium and copper with a thin and strong layer of their oxides by electrolysis is called anodizing process.
  2. When aluminium is anodized, a thin layer of aluminium oxide is formed all over the surface. This restricts the contact of aluminium metal with oxygen and water and prevents corrosion of aluminium.
    Hence, anodization method is useful for prevention of the corrosion of the aluminium.
shaalaa.com
  Is there an error in this question or solution?
Chapter 8: Metallugy - Write scientific reasons

APPEARS IN

SCERT Maharashtra Science and Technology 1 [English] 10 Standard SSC
Chapter 8 Metallugy
Write scientific reasons | Q 6

RELATED QUESTIONS

Give reasons:

Platinum, gold and silver are used to make jewellery.


 What special name is given to their corrosion of iron?


State two conditions for the rusting of iron.


Fill in the following blank with suitable word:

The corrosion of iron is called ................


Fill in the following blanks with suitable words:
Tiffin boxes are electroplated with .............. but car bumpers are electroplated with ............... to protect them from rusting.


Fill in the following blank with suitable word:

The corrosion of copper produces a .............. coating of basic copper carbonate on its surface


Fill in the following blanks with suitable words:
............ and .............. are necessary for the rusting of iron.


Why is an iron grill painted frequently?


What is the corrosion of iron known as?


Name two metals which resist corrosion due to the formation of a thin, hard and impervious layer of oxide on their surface.


 Name five methods of preventing rusting of iron.


Explain why, when a copper object remains in damp air for a considerable time, a green coating is formed on its surface. What is this process known as?


 Name a common metal which is highly resistant to corrosion.


Brass is an alloy of:
(a) Cu and Sn
(b) Cu and Pb
(c) Pb and Sn
(d) Zn and Cu


Mention two uses of the following metals and non-metals  

Iron 


Name the metal which is a constituent of plant pigment?


Explain how the activity series accounts for each of the following:

tendency to corrosion


Corrosion can be an advantage in some case.Explain ?


Compare roasting and calcination.


Complete the process of iron rusting by filling the blanks. Suggest a way to prohibit the process.
The iron rust is formed due to........................... reaction. Different
regions on iron surface become anode and cathode.
 Reaction on anode region :

`F_e(s) → Fe^(2+) (aq) +2e^-`

 Reaction on anode region :

`O_2(g) + 4H^+(aq) +............................ → 2H_2 O (l) `

When Fe2+ ions migrate from anode region they react with ................... to form Fe3+ ions.
A reddish coloured hydrated oxide is formed from ............... ions. It is called rust.

`2Fe_(3+) (aq) + 4H_2O(l) → ................. + 6H_+(aq) `

A way to prevent rusting ..................................................................

 

 


Write three methods of preventing rusting of iron.


Explain the term – rusting and give a word equation for the formation of rust. If polished iron nails are kept in three separate test tubes, state the contents in each test tube required, to prove the conditions for rusting.


State whether the statement given below is true or false. If false write the correct statement.

Either oxygen or moisture is essential for rusting.


Which of the following method is used to prevent the accumulation of greenish layer on brass due to corrosion?


To prevent corrosion of iron and steel _______ method is used.


Find the odd one out and give its explanation.


Write the name.

An alloy of copper and tin-


Draw a neat labelled diagram.

Anodizing


What is rust?


Observe the following diagram and give answers.

  1. Name this method of prevention of corrosion.
  2. For prevention of which metal this method is used?
  3. What is used as anode in this method?

Give preventive methods by giving examples of corrosion?


The process of coating the surface of the metal with a thin layer of zinc is called ______


Galvanisation is a method of protecting iron from rusting by coating it with a thin layer of ____________.


Amalgam is an alloy of ____________.


The table shown below gives information about four substances: A, B, C and D.

SUBSTANCE MELTING POINT (K) ELECTRICAL CONDUCTIVITY
SOLID LIQUID/ AQUEOUS
A 295 Good Good
B 1210 Poor Good
C 1890 Poor Good
D 1160 Poor Poor

Identify Ionic compounds from the above given substances.


Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents?


Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×