Related Questions

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
If 2 kg of metal, of which 1/3 is zine and the rest is copper , 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 17 : 43
B 13 : 42
C 19 : 43
D 15 : 42
Muntz metal is a/an alloys of
A Magnesium & tin
B Ferrous material
C Lead & tin
D Copper & zinc
Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio
A 50 : 50
B 30 : 70
C 70 : 30
D 40 : 60
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
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
Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as
A Sheradising
B Parkerising
C Anodising
D None of these
The metal used to recover copper from a solution of copper sulphate is
A Na
B Ag
C Hg
D Fe
An ore contains 26% of copper . To get 91 kgs of copper the quantity of are required is -
A 350 kg
B 240 kg
C 340 kg
D None of these
An alloy of copper, tin and zinc is known as
A Brass
B Bronze
C Gun metal
D Muntz metal

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