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Title: Chemistry questions of inorganic chemistry
Description: This a chemistry important questions for 2nd year students of inorganic chemistry these questions will help you to score well and good marks
Description: This a chemistry important questions for 2nd year students of inorganic chemistry these questions will help you to score well and good marks
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IIPUC-INORGANIC CHEMISTRY IMPORTANT QUESTIONS2023
V
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J
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NARENDRA-9481565750
Chapter-6
General principles and isolation of elements
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No-6,19 =1+3= 04M
Q
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Ans:
3
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Ans:
5
Ans:
6
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Froth floatation process
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Why?
Iron scrap is economically feasible and easily available (low cast)
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Heat
→
Complete the following equation, ZnO + C ⎯⎯⎯
Heat
ZnO + C ⎯⎯⎯
→ Zn + CO
Iron ore contains PbS and ZnS ,sodium cyanide used as an depressant which of these sulphide
comes with the froth
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Write the principle involved in Zone refining
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What is the composition of copper matte?
Cu2 S + FeS
8
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FeO + SiO2 ⎯⎯
9
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Name the reducing agent used for extraction of iron below 600 ℃
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CO
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Sodiumhydroxide
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Sodiumcyanide
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What type of ore is concentrated by forth floatation process
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Mention the role of cresols in the froth floatation method of concentrating sulphide ores?
Cresols and aniline acts as stabilizers
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Pig iron
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Limestone acts as flux and coke acts as fuel and reducing agent at high temperature
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Nickel
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Zirconoum or titanium
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Iodine
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Tin
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Name the metal refined by electrolytic method
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12
Ans:
13
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Ans:
15
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Ans:
18
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Ans:
20
Ans:
21
Ans;
22
Ans:
23
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Ans:
25
Ans:
26
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Ore is a mineral from which metals are extracted economically and conveniently
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What is meant by concentration of ore?
The process of removal of undesired impurities from the ores is called concentration of ore
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Name the purified by distillation method
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Name the carbonate ore of iron
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FeCO3
27
Ans:
28
Name flux used to remove iron impurity from molten copper matte
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(SiO2)
Name the metal extracted by oxidation reduction method
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Name the metal used for the reduction of gold by cyanide process
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Name the metal which is most abundant in the earth crust
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Name the purest form of iron
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commercial iron
Name the metal extracted by hydrometallurgy
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Name the metal extracted by electro-metallurgy
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Mention the principle ore of Aluminium
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Name the metal extracted by pyrometallurgy
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Name the transition metal present an alloy of Bronze
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( Bronze alloy of Cu+Tin)
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Ans:
33
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Ans:
36
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No-19 (3 mark)
1
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Nickel is heated in a stream of carbon monoxideat 330-350K forming volatile complex ,
nickel tetra carbonyl
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450 k
Step2 : Ni(CO)4 ⎯⎯⎯
→ Ni + 4CO
2
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It is useful for removing all the oxygen and nitrogen present in the form of impurity in Zr / Ti
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Zr + 2I2 ⎯⎯
step2 :It is decomposed on a tungsten filament electrical heated to about 1800K
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Ans:
4
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ZrI4 ⎯⎯
→ Zr + 2 I2
What is the role of limestone and coke during the extraction of cast iron using blast furnace
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Coke acts as reducing agent and fuel
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write chemical equation
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Ans:
Heat
ZnO + C ⎯⎯⎯
→ Zn + CO
Coke used as reducing agent
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Gold treated with dilute potassium cyanide in the presence of air form soluble complex
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4 Au + 8CN − + 2 H 2O + O2 ⎯⎯
When Soluble complex is treated with zinc , zinc replaces gold
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The process of heating concentrated ore in the presence of air or oxygen below their melting point
→ 2Zn + 3SO2
is called roasting
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The process of heating concentrated ore in the absence or limited supply of air is called
→ CaO + CO2
calcination
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Ans:
9
Ans:
Name the products liberated at anode and cathode during electrolysis of brine solution
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Explain oxidation reduction method for extraction gold/silver by hydrometallurgy
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→ 2M + Zn(CN ) 4
STEP2: 2[ M (CN ) 2 ]− + Zn ⎯⎯
2−
10
Ans:
11
Ans:
Explain Gravity separation process of concentration of ore
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Mention the two conditions to refine metal by vapour phase refining
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ii)
Volatile compound decomposed to give metal at high temperature
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No- 19 (3 marks)
1
Ans:
Write the chemical equations involved in the leaching of pure alumina from bauxite ore
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sodium aluminate is formed leaving impurities
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2 Na[ Al (OH ) 4 ]( aq ) + CO2( g ) → Al2O3 XH 2O( s ) + 2 NaHCO3( aq )
Step3: The sodium silicate remains in the solution and hydrated alumina is filtered, dried and
heated to get pureAl2O3
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xH 2O ⎯⎯⎯
→ Al2O3 + XH 2O
2
Ans:
Explain extraction of aluminium by Hall Heroult process:?
Aluminium can be extracted by the electrolysis of alumina by Hall- Heroult process
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Graphite rod acts as
anode steel tank acts as cathode
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C + 2O 2− ⎯⎯
→ CO2 + 4e −
Over all reaction : 2 Al2O3 + 3C ⎯⎯
→ 4 Al + 3CO2
3M
3
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Ans:
2CuFeS2 + O2 ⎯⎯
→ Cu2 S + 2 FeS + SO2
2Cu2 S + 3O2 ⎯⎯
→ 2Cu2O + 2SO2 ,
2 FeS + 3O2 ⎯⎯
→ 2 FeO + 2SO2 ,
FeO + SiO2 ⎯⎯
→ FeSiO3 (slag)
2Cu2O + Cu2 S ⎯⎯
→ 6Cu + SO2
...
Ans:
Explain extraction of copper from low grade copper
Title: Chemistry questions of inorganic chemistry
Description: This a chemistry important questions for 2nd year students of inorganic chemistry these questions will help you to score well and good marks
Description: This a chemistry important questions for 2nd year students of inorganic chemistry these questions will help you to score well and good marks