Related Questions

Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is
A Reduced preferentially
B Cheaper
C Oxidised preferentially
D Lighter
If 2 kg of metal, of which 1/3 is zinc and the rest is copper s, be mixed with 3 kg of metal , of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?
A 13 : 42
B 19 : 43
C 15 : 42
D 17 : 43
The coating of a thin layer of zinc on steel or iron objects is known as
A Hot dipping
B Tinning
C Galvanising
D Electroplating
The process of coating steel sheets by zinc to improve its corrosion resistance is called
A Calorising
B Galvanising
C Zincification
D Tempering
Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as
A Sheradising
B Parkerising
C Anodising
D None of these
In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following :
A Jet of water at high pressure
B Blast of air
C Mixture of water and air
D Rain of molten lead
The rusting of iron is a/an
A Physical change
B Electrochemical change
C Electrical change
D None of the above
The metal used to galvanise iron to protect it from rusting is
A Zinc
B Chromium
C Lead
D Antimony
Rusting of iron takes place due to
A Oxidation
B Carbonation
C Exfoliation
D Corrosion
Galvanised iron is made by coating iron with
A Zinc
B Nickel
C Chromium
D Sulphur

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