Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 10 English Medium Chemistry Production of Metals
Copper is refined electrolytically.The reaction occuring at the two electrodes are given.
Electrode 1 : Cu →Cu2+ + 2e
Electrode 2 : Cu2+ + 2e →Cu
Write whether Electrode 1 is anode or cathode.
Metals like copper and silver are refined by using electrolytic method .
(a) Which is the anode used in refining of copper ?
(b) Write the equation of reaction occuring at anode and cathode during the refining of copper.
(a) Impure copper is used as anode.
(b) Anode : Cu →Cu2+ + 2e
Cathode : Cu2+ + 2e
Which is the method used to refine tin?Why?
Liquation, Melting point of tin is less than that of the
Different methods are used to convert the ores ZnCO3,Cu2S in to oxides.Write the appropriate methods to convert these ores.
ZnCO3 - Calcination
Leaching is a process in aluminium production.To which of the following
class does it belong ?
(a) Concentration of ore
(b) Extraction of metal
(c) Refining of metal
(a) Concentration of
(a) Which is the method used to concentrate copper pyrites?
(b) What property of the ore is utilised here ?
(a) Froth floataton
(b)Density of ore is lighter than that of
Which is an ore of iron ?
(Bauxite , Cryolite,Haematite ,Clay )
Which is not a basic metallurgical process ?
(c) Concentration of ore
(d) Extraction of metal
The method used to prepare a metal from an ore is known as ..................... .
Extraction of metal
Minerals from which metals can be extracted easily are known as.................
Which is not a mineral of aluminium ?
( Bauxite, Cryolite , Sand, Clay )
Which among the following metals exists in the elemental state in nature?
(Magnesium , Sodium ,Gold ,Aluminium )
The main gangue in iron ore is SiO2
(a) Name the important ore of iron ?
(b) Name the substances used to remove gangue from an ore ? Which is the substance used to remove SiO2 from iron ore?
The figure showing the electrolytic refining of copper is shown .
What are the anode,cathode and electrolyte of this cell ?
Anode - Impure copper
Cathode - Pure copper
Electrolyte - Copper sulphate solution with H2SO4
Figure of electrolysis of alumina is shown
(a) What are the anode and cathode ?
(b) Write the equation of cathode reaction.
(c) The anode blocks are to be replaced occasionally; Why?
(a)Anode - Carbon rods
Cathode - Carbon lining
(b) Al 3+ + 3e → Al
(c) The anode (carbon) is
The figure of electrolytic production of aluminium is given
(a)Name the process of production of aluminium ?
(b) What are the anode and cathode of the cell ?
(c) What is the role of cryolite in the electrolysis?
(a) Hall-Heroult process
(b) Anode - Carbon rods
Cathode - Carbon lining
(c) To dissolve alumina /to reduce melting point of
(a) Name the ore of aluminium ?
(b) Which is the method used to concentrate the ore of aluminium?
(c) Name the process used to produce aluminium ?
Names of some alloy steels are given in the box .
(a) What is the common component in all these steels ?
(b) Which steel is used to make heating coils?
(c) Which is the steel is used to make permanent magnets ?
(d) What is the similarity between stainless steel and nichrome ?
(d) Both of them contain same
Equation of reaction occuring in blast furnace during the production of iron are given.
CaCO3 → CaO + CO2
Fe2O3 + 3 CO → 2 Fe + 3 CO2
CaO +SiO2 → CaSiO3
(a) Which of these represent slag formation reaction ?
(b) Which is the substance acting as reducing agent in blast furnace?
(a) CaO +SiO2 →CaSiO3
Iron produced in blast furnace
(a) Name the ore used here ?
(b) Why coke is added along with the ore to the blast furnace ?
(c) What is the role of limestone in blast furnace?
(b)For the reduction of ore/For the formation of CO.
(c)To remove the
Ag , Fe, Sn, Na, Au
(a) Arrange the above metals in the decreasing order of their reactivity?
(b) Which metal is produced by reduction using electricity ?
(c) Which of the above occur free in nature ?
(d) Name the metal for which the compounds are highly stable ?
(a) Na > Fe>Sn>Ag>Au
a)Complete the table.
Method of refining
(a) identify x and y
(b) Which property of metals is made use of in the above process ?
(a) x - Liquation
y - distillation
(b) Melting point of tin is lower than impurities.
Boiling point of
Equation related with the concentration of two ores of Zn are given.
i. ZnCO3 + Heat ? ZnO + CO2
ii. ZnS +O2 + Heat ? ZnO + SO2
a .Which of these equation represent roasting?
b . How does roasting differ from calcination ?
(b)Calcination is carried out in the absence /limited supply of air .Where as roasting is carried out with the presence of excess
Nature of the ore
The method of concentration
Density of the ore is heavier than gangue
Ore and gangue do not dissolve in same solvent
Ore of gold
Density of the ore is lighter than gangue
Magnetic natured ore
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