Related Questions

One of the methods of purification of leach liquor is ion exchange, which involves
A Exchange between two liquid phases
B Exchange between a gaseous phase and a liquid phase
C Exchange between a liquid phase and an organic resin phase
D Exchange between a solid phase and a gas phase
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
Black liquor is converted into white liquor by
A Evaporation and burning the concentrate followed by causticisation of products
B Multi-effect evaporation only
C Selective liquid extraction
D Extractive distillation
In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of
A Concrete
B Wood
C Steel
D Porcelain
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
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
Lead cadmium and mercury are all examples of water pollutants called:
A Metalloid
B Alkaline metals
C Heavy metals
D Alkaline earth metals
Which one of the following diseases is caused by cadmium pollution?
A Minamata
B Itai-Itai
C Fluorosis
D Blue baby syndrome

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