Advertisements
Advertisements
प्रश्न
Give reason.
Copper and brass utensils should be tinned.
Advertisements
उत्तर
Copper and brass materials also undergo corrosion, resulting in the formation of a greenish layer on this surface. When the surface of copper or brass is contacted by air or water, it results in corrosion, and to prevent this, the process of tining is used. In this process, copper and brass articles are coated with tin.
संबंधित प्रश्न
Choose the correct answer from the options given below:
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as
A. Smelting
B. Ore-dressing
C. Calcination
D. Bessemerisation
Explain why, iron sheets are coated with zinc.
The corrosion of copper produces a ______ coating of basic copper carbonate on its surface.
Name any two metals which do not corrode easily.
Explain why, the galvanised iron article is protected against rusting even if the zinc layer is broken.
Corrosion can be an advantage in some case.Explain ?
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.
Stainless steel is an alloy of _______.
Bronze : _______ : : Stainless steel : Fe + Cr + C
Write scientific reason.
On exposure to air, silver articles turn blackish after some time.
