Saturday, November 28, 2015

Chemistry Quiz For SSC Exams

1. The compound of a metal found in nature is called____
(a) mineral
(b) ore
(c) flux
(d) slag


2. A naturally occurring substance from which a metal can be profitably extracted is called____
(a) mineral 
(b) gangue
(c) ore
(d) flux
3. Rocky impurities present in a mineral are called____
(a) flux
(b) gangue
(c) matte
(d) slag
4. The froth floation process is used for the concentration of____
(a) oxide ores 
(b) sulphide ores 
(c) halide ores 
(d) silicate ores 
5. Copper pyrites (CuFeS_2) are concentrated by____
(a) electromagnetic method 
(b) gravity method 
(c) froth floatation method 
(d) all of above methods 
6. Cyanide process is used for extraction of____
(a) Ag 
(b) Au 
(c) Cu 
(d) Zn
7. The most abundant element or earth curst is____
(a) hydrogen  
(b) oxygen  
(c) silicon 
(d) carbon
8. Iron ore is concentrated by____
(a) froth floation 
(b) electrolysis 
(c) roasting  
(d) magnetic treatment 
9. The magnetic separation is used for increasing concentration of the following____
(a) horn silver 
(b) calcite  
(c) haematite 
(d) magnesite 
10. The oil used in the floatation method for the purification of ores is____
(a) coconut oil
(b) olive oil
(c) pine oil 
(d) none



Answers Key
1.(a)
2.(c)
3.(b)
4.(b)
5.(c)
6.(b)
7.(b)
8.(d)
9.(c)
10.(c)

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