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
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
Zn2+ আয়নের জলীয় দ্রবণে NaOH যোগ করলে সাদা অধঃক্ষেপ উৎপন্ন হয় এবং অতিরিক্ত NaOH যোগে অধঃক্ষেপ পুনরায় দ্রবীভূত হয়। এই দ্রবণে Zinc কোথায় অবস্থান করে?
A ক্যাটায়নিক ও অ্যানায়নিক উভয় অংশে
B দ্রবণে Zn2+ অবশিষ্ট থাকে না
C ক্যাটায়নিক অংশে
D অ্যানায়নিক অংশে
Zinc deficiency causes
A Skin ulcer
B Depressed immune response
C Hypogonadal dwarfism
D Hypothyroidism
E Peptic ulcer
Important features of zinc deficiency are
A Perioral ulceration
B Mental retardation
C Diarrhoea
D Raw beef tongue
E Hypoproteinemia
Which of the following is not an ore of zinc?
A Limonite
B Zincite
C Calamine
D Franklinite
What is the melting point of zinc?
A 419oC
B 600oC
C 907oC
D 950oC

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