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Worksheetsch rn map of iron
Total questions: 137
Worksheet time: 1hrs 9mins
Which of the following statements is correct?
Iron can be dissolved in diluted hydrochloric acid, producing iron (III) chloride and water.
Iron can be dissolved in diluted hydrochloric acid, producing iron (II) chloride and hydrogen gas.
Iron can be dissolved in diluted hydrochloric acid, producing iron (II) chloride and water.
Iron can be dissolved in diluted hydrochloric acid, producing iron (III) chloride and hydrogen gas.
Which of the following acids upon reaction with iron will result in the passivity of the metal?
Concentrated H2SO4
Dilute HNO3
Concentrated HNO3
Dilute H2SO4
Which of the following statements is correct?
Iron can be dissolved in diluted hydrochloric acid, producing iron (III) chloride and water.
Iron can be dissolved in diluted hydrochloric acid, producing iron (II) chloride and hydrogen gas.
Iron can be dissolved in diluted hydrochloric acid, producing iron (II) chloride and water.
Iron can be dissolved in diluted hydrochloric acid, producing iron (III) chloride and hydrogen gas.
Which of the following acids upon reaction with iron will result in the passivity of the metal?
Concentrated H2SO4
Dilute HNO3
Concentrated HNO3
Dilute H2SO4
Iron (II) oxide can be fully oxidized in dry hot air to give which of the following iron compounds?
Fe2O3
Fe3O4
Fe(OH)2
FeO
Fe(OH)3
Which of the following reactions yields iron (III) oxide?
Heating iron (III) hydroxide above 200∘c
The reaction of magnetic iron oxide with carbon monoxide at 400–700∘C
The reaction of red-hot iron with steam
Heating iron(II) oxalate in the absence of air
All of the following are methods of preparation of iron (II) oxide except……..
heating iron (II) oxalate in the absence of air
heating iron (II) oxalate in the presence of air
the reduction of Fe2O3
the reduction of Fe3O4
Which of the following products result from heating iron (II) sulfate?
Iron (III) oxide and sulfur dioxide only
Iron (III) oxide, sulfur dioxide, and sulfur trioxide
Iron metal, sulfur dioxide, and sulfur trioxide
Iron (II) oxide, sulfur dioxide, and sulfur trioxide
The red–brown precipitate shown in the picture is produced in the reaction between an iron salt and a dilute alkali solution. When the precipitate is isolated and dried and then heated in an ignition tube, water vapor was found to be present along with another iron compound, X.What is a possible identity of X?
Fe(OH)3
Fe2O3
FeO
FeSO4
FeCl3
Which of the following is the resulting product from the reaction of iron with dry air?
Fe3O4 (S)
Fe2O3(S)
FeO(S)
Fe3O4 (S) + Fe2O3 (S)
Fe2O3 (S) + FeO (S)
Which of the following statements is true about the reaction of iron (III) oxide with hot concentrated sulfuric acid?
Iron metal and water vapour are formed.
Iron (III) sulfate and water vapour are formed.
Iron (III) sulfide and water vapour are formed.
Iron (III) sulfate and hydrogen gas are formed.
Magnetic iron oxide reacts with hydrogen gas at a temperature range of 400–700∘C.Which of the following products are formed?
Iron (III) oxide and hydrogen gas
Iron (II) oxide and water vapour
Iron (III) oxide and water vapour
Iron metal and water vapour
Red-hot iron reacts with steam at a temperature of 500∘C.The produced solid is then treated with hot concentrated sulfuric acid. What products are now formed?
Aqueous iron (III) sulfate and water vapour only
Aqueous iron (II) sulfate and water vapour only
Aqueous iron (II), iron (III) sulfate, and water vapour
Aqueous iron (II), iron (III) sulfate, and hydrogen gas
Which of the following are the products of the reaction of iron metal with dilute sulfuric acid?
Iron (III) sulfate and hydrogen gas
Iron (III) sulfate, iron (II) sulfate, and water vapour
Iron (II) sulfate and hydrogen gas
Iron (III) sulfate and water vapour
Which of the following is the resulting product from the reaction of iron with chlorine?
FeCl3(s)
FeCl(s)
FeCl3(s)+FeCl2(s)
FeCl2(s)
FeCl3(s) + FeCl(s)
What is the name of the salt produced from the reaction of iron metal with sulfur?
Iron (II) sulfide
Iron (III) sulfate
Iron (III) sulfide
Iron (II) sulfite
Which of the following schematic diagrams represents how to obtain magnetic iron oxide from iron II oxide?
a
b
c
d
In the opposite scheme. Which of the following choices is true for both A and B?
They both react with hydrochloric acid
they both dissolve in water
They both contain Fe3+ cations
They both react with ammnoia
solution
The following schemes shows some chemical reactions.
Which of the following statement is incorrect?
compound 4 decomposes by heat forming
red iron oxide
oxidation number of iron in both
compounds 1 and 4 is +3
the aqueous solutions of both salts 1 and 3
are acidic
compound 5 is in solution form while
compound 6 is solid
The following scheme shows some reactions of the transition metal (M) and its compounds:
Which of the following choices represents (W), (X) , (Y) and (Z)?
(W) : MSO4
(X) : M(OH)3
(Y) : M2O3
(Z) : M3O4
(W) : MSO4
(X) : (COO)2M
(Y) : MO
(Z) : M3O4
(W) : M2(SO4)3
(X) : M(OH)2
(Y) : MO
(Z) : MO
(W) : M2(SO4)3
(X) : COOM
(Y) : M2O3
(Z) : MO
Which of the following is not true for the properties of the red iron oxide?
It is reduced yielding a black compound.
It can be reduced to two types of oxides.
It is prepared by burning iron (II) sulphate in air.
It reacts with the acids forming a mixture of the solutions of iron (II) and iron (III) salts.
Which of the following statements is correct?
Iron can be dissolved in diluted hydrochloric acid, producing iron (III) chloride and water.
Iron can be dissolved in diluted hydrochloric acid, producing iron (II) chloride and hydrogen gas.
Iron can be dissolved in diluted hydrochloric acid, producing iron (II) chloride and water.
Iron can be dissolved in diluted hydrochloric acid, producing iron (III) chloride and hydrogen gas.
Which of the following compounds when heated does not lead to the evolution of O2 gas ? …………
KMnO4
(NH4)2Cr2O7
k2Cr2O7
H2O2
The opposite figure is for one of iron oxides ..
Which of the following statements about this compound is correct ? ………..
Oxidation number of iron in this compound is +2
It is reduced by CO at a temperature higher than
700 C forming iron.
The percentage of iron in it increases by roasting.
It can be obtained from the reaction of FeO with
dilute H2SO4.
When two substances were mixed, it was noticed that there was a change in colour, no effervescene happened and no precipitate was found ..
What are these substances ? …………
Dilute nitric acid and lead (II) carbonate.
Sodium hydroxide solution and sulphuric acid.
Potassium chloride solution and silver nitrate solution.
Hot hydrochloric acid and iron (II) oxide.
All the following are methods for preparing red iron oxide .. Exept ………
oxidizing black iron oxide.
the reaction of red hot iron with air.
heating iron (II) oxalate in air.
the thermal decomposition of iron (III) hydroxide.
The following scheme shows some chemical reactions (without mentioning the reaction conditions) :
Which of the following statements is incorrect ? …………..
The aqueous solutions of both salts (1) and (3) are acidic.
Oxidation number of iron in both compound (2) and (4) is +3
Compound (5) is in solution form, while compound (6) is solid.
Compound (4) decomposes by heat forming red iron oxide.
An iron oxide is formed by heating (in absence of air) the salt which is produced from heating iron (II) carbonate with ……….
acetic acid
oxalic acid
formic acid
benzoic acid
Which of the following iron reactions occurs at room temperature (25 C) ? …………..
a
b
c
d
What are the numbers of the moles of each of iron, oxygen and hot concentrated sulphuric acid required to prepare 2 mol of iron (III) sulphate ? …………..
a
b
c
d
These are three chemical equations :
Which of the following statements is correct ? …………..
Compound (X) is reduced forming both compounds (Y) and (Z).
Compound (X) is oxidized forming both compounds (Y) and (Z).
Compound (Z) is reduced forming compound (X), and when it is oxidized it forms
compound (Y).
Compound (Y) is reduced forming compound (X), and when it is oxidized it forms
compound (Y).
When acidified KMnO4 reacts with FeSO4 , …………..
FeSO4 is oxidized only.
KMnO4 is oxidized only.
FeSO4 is oxidized and KMnO4 is reduced.
No oxidation or reduction reaction happens.
In terms of the reaction :
All the following statements match compoumd (X) .. Except that ………
it is used as a catalyst in the preparation of sulphuric acid by contact method.
it is used as a catalyst in superconducting magnets industry.
it is a paramagnetic substance.
it represents the highest stable oxidation state of vanadium.
Converting iron (III) hydroxide into iron (II) oxide includes …………
oxidation process then reduction process.
thermal decomposition process then reduction process.
reduction process then simple displacement process.
thermal decomposition process then oxidation process.
Iron (II) hydroxide can be obtained from iron (II) oxide through …………
the reaction of iron (II) oxide with a dilute acid then the reaction of the produced salt solution with another acid.
the oxidation reaction of iron (II) oxide then the reaction of the produced oxide with NH4OH
the reaction of iron (II) oxide with a dilute acid then treating the produced solution with NHOH solutions.
the strong heating of iron (II) oxide then the reaction of the produced oxide with water.
Iron can be obtained from iron (II) sulphate in two steps, this process is accompanied with ………..
the evolution of SO2 and SO3 gases only.
the evolution of SO2 and CO2 gases only.
the evolution of sulphur dioxide, sulphur trioxide and water vapour only.
the conversion of CO into CO2 , as well as H2 into H2O
What happenes when ammonia solution is added to the solution of the compound produced from the combination of iron with chlorine gas ? ………….
Iron (II) hydroxide is formed.
A greenish white precipitate is formed.
A precipitate is formed in an acidic solution.
A reddish brown precipitate is formed, by the strong heating, it is converted into the mixed iron oxide.
Oxidizing iron (at 500 C) , then reducing the produced compound (at 500 C) yields …………..
Fe
FeO
Fe3O4
Fe2O3
On the reaction of carbon monoxide gas with the solid compound produced by the strong heating of iron (II) sulphate , …………
a gas is formed turns clear limewater turbid.
a group of gases is formed, they all turn clear limewater turbid.
a group of gases is formed, one of them turns a paper wetted with lead (II) acetate solution to black.
a group of gases is formed, one of them turns acidified potassium permanganate solution to green.
The mass of each following decreases by heating in air .. Except ……….
iron (II) oxalate
iron (II) carbonate
iron
magnetic iron oxide
On heating iron to redness, then exposing it to water vapour, the product (A) is formed, and when concentrated hydrochloric acid is added to compound (A), products are formed which are ……….
a
b
c
d
Which of the following schematic diagrams represents how to obtain magnetic iron oxide from iron (II) oxide ? ……..
a
b
c
d
When cold dilute hydrochloric acid is added to a blend of iron filings and magnetic iron oxide, the formed products will be ………..
FeCl2 and H2
FeCl2 and H2O
FeCl2 and FeCl3
FeCl3 , FeCl3 , H2O and H2
A blend of iron (II) chloride can be prepared by the following methods .. Except ……….
passing chlorine gas on red hot iron.
passing water vapour on red hot iron then adding conc, HCl to it.
heating iron (II) sulphate and treating the products with CO gas (at 270 C) then adding conc, HCl to it.
heating a blend of iron (III) hydroxide and iron (II) hydroxide with concentrated hydrochloric acid.
On heating the substance (X), Fe2O3 is formed, andon heating the substance (Y) in absence of airm FeO is formed, while on heating the substance (Z) to 500 C in air, Fe3O4 is formed ..
What is the correct choice which represents the substances (X) , (Y) and (Z) ? ……..
(X) : FeSO4
(Y) : Fe
(Z) : (COO)2Fe
(X) : Fe
(Y) : (COO)2Fe
(Z) : Fe
(X) : FeSO4
(Y) : (COO)2Fe
(Z) : Fe
(X) : (COO)2Fe
(Y) : Fe
(Z) : FeSO4
By heating iron (II) sulphate in absence of air.
Then adding Conc / Hot H2SO4……. Is formed and water
iron (II) oxide
iron (III) sulphate
magnetic iron oxide
iron (II) sulphate
Iron dissolves in diluted acids and produces ……. and H2
Iron (III) Salts
Iron (II) Salts
Iron (II) oxide
Iron (III) oxide
To get iron II sulphide from FeCl3
adding NaOH, heating > 200˚C, reduction then Δ/S
reduction, heating > 200˚C, adding NaOH then Δ/H2S
heating > 200˚C, reduction, heating/S then add NaOH
all
On heating iron with conc / hot H2SO4 the gas evolves causes
a pop sound with light match
changes Acidified K2Cr2O7 into green
changes Acidified KMnO4 into colorless
changes Acidified K2Cr2O7 into green and changes Acidified KMnO4 into colorless
On heating iron(ɪɪ) oxalate in absence of air, then treatment the produced solid
substance by dil. sulphuric acid……………. are formed.
iron(ɪɪɪ) sulphate and water
iron(ɪɪ) oxide, CO and CO2 gases
iron(ɪɪɪ) oxide and CO2 gas
iron(ɪɪ) sulphate and water
To get FeCl3 from FeCO3 by
heating, reduction, reaction with Cl2
heating, oxidation, reaction with conc HCl
oxidation, reaction with HCl, reduction
heating, reduction, reaction with Cl2 and heating, oxidation, reaction with conc HCl
On heating limonite strongly in air then, adding conc. HCl …………. Is formed
FeCl2
FeCl3
FeCl2 and FeCl3
no reaction
Cu can be separated from an alloy of Cu, Fe by adding
H2O
conc HNO3
conc H2SO4
dill HCl
On heating iron II oxalate strongly in air ………. Is formed
FeO
Fe
Fe3O4
Fe2O3
To get FeCl3 from FeSO4
heating then add conc HCl
heating, reduction then add Cl2
heating then add Cl2 gas
heating then add conc HCl and heating, reduction then add Cl2
After roasting siderite ore, the final product will be …………
Fe2O3
FeO
Fe3O4
Fe(OH)2
On heating iron II carbonate then adding HCl ……………... is formed
FeCl3
Fe
FeCl2
FeCl3 and Fe
Heating iron II oxalate in air then, adding conc/hot H2SO4 ………. formed
FeSO4
Fe2(SO4)3
FeS
FeSO4 and Fe2(SO4)3
FeO reacts with dilute acid to give ...................
iron (II) salt
iron (III) salt
iron (II) salt and H2O
iron (III) salt and water
On heating iron (ɪɪ) oxalate in air, ……………is formed.
iron (ɪɪ) oxide
iron (ɪɪɪ) oxide
magnetic iron oxide
iron (ɪɪɪ) sulphate
When Iron (II) sulphate solution is exposed to air for enough time then sodium
hydroxide solution is added this will cause the formation of reddish brown
ppt as a result of :…………….
reduction then precipitation.
precipitation then oxidization.
oxidization then precipitation.
precipitation then reduction.
Fe2O3 reacts with conc acid producing ………. salt.
Iron (II) only.
Iron (III), (II) and water.
Iron (III) and water.
Iron (II) and water,
Heating iron II oxalate over than 700˚C in absence of air forming ……….
FeO
Fe2O3
Fe
Fe3O4
Heating iron II oxalate over than 700˚C in absence of air forming ……….
FeO
Fe2O3
Fe
Fe3O4
Iron(ɪɪɪ) oxide can be obtained by strong heating of these compounds, in absence of air, except…………….
iron(ɪɪ) sulphate
iron(ɪɪ) oxalate
iron(ɪɪɪ) hydroxide
hydrated iron(ɪɪɪ) oxide
To get Fe2O3 from siderite by
heating then oxidation
oxidation then heating
Roasting
heating then oxidation and oxidation then heating
To get FeCl3 from FeCO3 by
heating, reduction, reaction with Cl2
heating, oxidation, reaction with conc HCl
oxidation, reaction with HCl, reduction
heating, reduction, reaction with Cl2 and heating, oxidation, reaction with conc HCl
Heating iron II sulphate strongly then add conc hot HCl …………… is formed
FeCl2
FeCl3
FeCl2 and FeCl3
no reaction
Heating iron (II) oxalate strongly over 700˚C in absence of air ………... is formed.
FeO
Fe
Fe2O3
Fe3O4
siderite is roasted in air by heating to convert it to…………...
FeO
Fe3O4
Fe2O3
Fe(OH)2
On heating iron(ɪɪ) oxalate in absence of air, then treatment the produced solid
substance by dil. sulphuric acid,…………….are formed.
iron(ɪɪɪ) sulphate and water
iron(ɪɪ) oxide, CO and CO2 gases
iron(ɪɪɪ) oxide and CO2 gas
iron(ɪɪ) sulphate and water
Iron II sulphide can be obtained from magnetic iron oxide by
reduction then heating with S
reduction then passing dil H2S
oxidation then adding H2S
reduction then heating with S and reduction then passing dil H2S
On heating rust > 200˚C then add conc HCl ……... is formed
FeCl2
FeCl3
no reaction
FeCl2 and FeCl3
Reduction of Fe2O3 over than 700˚C then, adding (dilute)HCl ……… is (are) formed.
FeCl3
FeCl2
no reaction
FeCl3 and FeCl2
An excess of FeCl2 added to acidified KMnO4 which statement are correct?
(1) The purple color disappears
(2) Iron (II) reduced to iron (III)
(3) Mn (VII) ions are oxidized to Mn (II) ions.
(4) KMnO4 is an oxidizing agent.
1 & 2
1 & 4
2 & 3
3 & 4
Iron reacts with Cl2 forming ................... because Cl2 is a (an) …………
FeCl2/reducing agent.
FeCl3/oxidizing agent.
FeCl3/reducing agent.
FeCl2/oxidizing agent
During roasting, the siderite changed into ………….
FeCO3
Fe2O3
FeO
Fe
Heating iron II sulphate strongly then, add conc HCl for the resulting forming ……………
Fe2O3
SO3
FeCl3
FeCl2
On heating iron till red hot in presence of steam then, add conc hot H2SO4 ……formed.
FeSO4
Fe2(SO4)3
SO2
FeSO4 & Fe2(SO4)3
To separate carbon from steel………. is added
conc HNO3
heating
dilute HCl
magnet
One heating siderite in air then, add conc HCl ............. is formed and water.
FeCl3
FeCl2
Fe2O3
FeO
Heating a sample of iron II carbonate which observation shows the complete
decomposition of FeCO3? ..........
The mass of the FeCO3 becomes larger and then constant.
The mass of FeCO3 becomes smaller and then constant.
The gas evolved causing pop sound.
No gas evolved.
On heating iron II sulphate then, add H2S………. is formed.
Fe2S3
FeO
FeS
Fe2O3
To get iron II sulphide from FeCl3
adding NaOH, heating > 200˚C, reduction then Δ/S
reduction, heating > 200˚C, adding NaOH then Δ/H2S
heating > 200˚C, reduction, heating/S then add NaOH
all
To get iron II chloride from iron II oxalate by
heating in absence of air, reduction then add dil HCl
heating in absence then add HCl
heating in absence of air, oxidation then add conc HCl
heating in absence of air, reduction then add dil HCl & heating in absence then add HCl
On heating iron II oxalate in absence of air then adding H2S ……. Is formed
FeS
Fe2S3
FeO
FeS & Fe2S3
On heating Fe2O3 with CO till 380˚C then, adding conc hot H2SO4 ……………
is (are) formed.
FeSO4
FeS
Fe2(SO4)3
FeSO4 & Fe2(SO4)3
To get FeCl3 from siderite can be done by ………...
Roasting then adding conc HCl
Heating, Reduction over 700°C then adding Cl2
Heating in absence of air then adding HCl
Roasting then adding conc HCl and Heating, Reduction over 700°C then adding Cl2
What is the balanced equation of the reaction of iron metal with chlorine?
a
b
c
d
What is the correct balanced symbol equation for the reaction of magnetic iron oxide with hydrogen gas?
a
b
c
d
When iron is treated with concentrated nitric acid, a thin oxide layer is formed preventing further reaction with the metal. Which of the following can be added to remove this layer?
Aqueous potassium hydroxide
Dilute hydrochloric acid
Dilute carbonic acid
Aqueous sodium hydroxide
Which of the following is the correct balanced symbolic equation showing the reaction of iron with hot concentrated sulfuric acid?
a
b
c
d
e
If Fe reacts with sulphur, then add dil HCl the gas can be tested by…………
lime water
KMnO4
lead acetate
K2Cr2O7
Iron (II) oxide can be oxidized by the following except …………….
SO3
KMnO4
K2Cr2O7
H2
What happens when hematite is converted into steel ?
Reduction only
Reduction then oxidation
Oxidation only
Oxidation then reduction
According to the opposite figure which shows the metal (M) and the compound (X) which (M) is a part of its chemical composition .. Which of the following statements is not correct ? ……..
Metal (M) reacts with concentrated sulpuric acid, while concentrated nitric acid causes its passivity.
Metal (M) used as catalyst in preparing ammonia in industry.
Compound (X) decomposes by heat yielding FeO , SO2 and SO3
Compound (X) solution reacts with ammonium hydroxide solution forming a while green precipitate.
The opposite figure shows an earth’s crust rock which contains an iron ore .. What is the chemical equation that represents a reaction of this oxide?
a
b
c
d
A piece of iron was immersed in the acid (X) for two days, then after being washed with distilled water , it was transferred into a beaker containing dilute HCI solution, so it was observed that no instantaneous reaction occurred .. what is the acid (X) in which the piece of iron was immersed?
Dilute sulphuric acid
Concentrated sulphuric acid
Dilute hydrochloric acid
Concentrated nitric acid
The following equation represents the conversion of the oxide (X) to the iron oxide (Y): 6X + O3 →3Y
Which of the following statements is correct?
Each 2 mol of (X) are oxidized to 3 mol of (Y)
Each 3 mol of (X) are reduced to 2 mol of (Y)
Each 2 mol of (X) are oxidized to 1 mol of (Y)
Each 1 mol of (X) is reduced to 2 mol of (Y).
What is the number of the coulored compounts used in and produced from the conversion of iron (III) hydroxide to magnetic iron oxide ? ……….
1
2
3
4
It is possible practically to convert iron (II) sulphate salt into iron (III) chloride
solution .. What is the number of the moles of each of iron oxide and the acid which are used to produce 4 mol of iron (III) chloride ? ………….
No. of moles of iron oxide : 2
No. of moles of iron acid : 4
No. of moles of iron oxide : 2
No. of moles of iron acid : 12
No. of moles of iron oxide : 4
No. of moles of iron acid : 6
No. of moles of iron oxide : 2
No. of moles of iron acid : 2
Which of the following is not true for the properties of the red iron oxide?
It is prepared by burning iron (II) sulphate in air
It reacts with the acids forming a mixture of the solutions of iron (II) and iron (III) salts
It is reduced yielding a black compound.
It can be reduced to two types of oxides.
The opposite figure shows one of iron compounds, the following statements about this compound are correct… Except that it…..
Is prepared by oxidizing Fe3O4
Is prepared by heating iron (II) oxalate in air.
Can react with the mineral hot concentrated acids
yielding iron (III) salts and water vapour.
Us prepared by reducing one of the black iron oxides
The opposite figure shows one of the solutions of iron ..which of the following statements about this solution is correct?
It is oxidized forming iron (III) oxide.
It reacts with dilute sulphuric acid forming iron (II) sulphate.
It reacts with ammonium hydroxide solution forming a reddish brown ppt.
It is reduced by carbon monoxide forming iron (II) oxide.
Magentic iron oxide can be converted into a yellow solution of an iron salt by ………….
Reducing magnetic iron oxide, then the reaction of the produced oxide with HClacid.
Reducing magnetic iron oxide, then the reaction of the produced oxide with water.
Oxidizing magnetic iron oxide, then the reaction of the produced oxide with NaOH solution.
Oxidizing magnetic iron oxide, then the reaction of the produced oxide with hot conc, HCI acid.
On reducing iron (III) oxide with water gas then treating the solid product with dilute sulphuric acid , the substance (X) is formed ..
What is the chemical formula of the substance (X) ? ……….
Fe2(SO4)3
FeSO4
FeS
FeS2
What is the fact which can not be concluded from the two reactions of converting iron (III) oxide into iron (II) sulphate?
The oxide produced from reducing Fe2O3 by hydrogen (at 400o : 700oC) is a basic oxide.
Basic oxides react with acids forming salt and water.
H2 gas is used as a reducing agent.
Products of reducing Fe2O3 vary with the reaction temperature.
It is possible to convert iron (III) hydroxide into iron (II) hydroxide in 4 steps ..
Which of the following statements is correct ? ………
The first step is a thermal decomposition reaction and the second is reduction reaction only.
The first and the third steps are not oxidation-reduction reactions.
The first step is an oxidation-reduction and the fourth is accompanied by the formation of a precipitate.
Iron (III) oxide is reduced in the second step and NaOH is reduced in the forth step.
Iron oxide reacts with dilute hydrochloric acid forming pale green iron chloride solution can be obtained from ……….
heating Fe3O4 in air.
heating iron (II) oxalate in absence of air.
oxidizing black iron oxide.
reducing Fe2O3 at 100
When 1 mol of magnetic iron oxide reacts with 8 mol of hot concentrated hydrochloric acid, ……….
6 mol of products are formed.
5 mol of chloride are formed.
6 mol of iron (III) chloride are formed.
3 mol of iron (III) ions are formed.
All the following are methods for preparing iron (II) oxide .. Except ...........
reducing red iron oxide.
reducing magnetic iron oxide.
heating iron till redness in the air.
the thermal decomposition of iron (II) hydroxide.
What are the substances required to be available with iron (II) oxalate in lab. To form iron (III) sulphate…………………..
Iron (II) oxide, oxygen and hot concentrated sulphuric acid
Iron (III) oxide, oxygen and hot concentrated sulphuric acid
Iron (II) oxide, iron (III) oxide, oxygen and hot concentrated sulphuric acid
Oxygen and hot concentrated sulphuric acid.
On the reaction of red hot iron , a compound is formed where ..........
1 mol of it is reduced by 4 mol of H2 forming 1 mol of iron.
1 mol it reacts with 8 mol of HCl yielding 2 mol of FeCl2 and water only.
1 mol of it is reduced by 1 mol of H2 (at 400° to 700°C).
It is oxidized to FeO when heated in air.
What is the number of iron (II) sulphide moles which can be obtained from 1 mol of magnetic iron oxide?
1 mol
2 mol
3 mol
4 mol
Iron oxide (X) produced from heating iron (II) oxalate in absence of air can be oxidize completely into iron oxide (Y) .. Which of the following statements is correct?
Oxidizing 2 mol of the oxide (X) yields 3 mol of the oxide (Y).
Oxidizing 2 mol of the oxide (X) yields 1 mol of the oxide (Y).
Oxide (Y) can be either oxidized or reduced.
Oxide (X) can be reduced to iron complex oxide.
On heating iron II sulphate then, add conc HCl …………… is formed.
Fe2O3
FeCl3
FeCl2
none
On heating rust > 200˚C then, reduce the result from (400-700) …… is formed.
Fe2O3
FeO
Fe
Fe3O4
Heating iron II oxalate in air then, adding conc hot H2SO4 …………... is formed
and water
Fe2(SO4)3
FeS
FeSO4
all
Iron reacts with dilute H2SO4 form …………… bec. H2 is …………….
FeS/oxidizing agent
FeSO4/reducing agent
Fe2(SO4)3/oxidizing agent
FeSO4/oxidizing agent
siderite is roasted in air by heating to convert it to…………...
FeO
Fe3O4
Fe2O3
Fe(OH)2
On heating iron(ɪɪ) oxalate in absence of air, then treatment the produced solid
substance by dil.sulphuric acid,………….are formed.
iron(ɪɪɪ) sulphate and water
iron(ɪɪ) oxide, CO and CO2 gases
iron(ɪɪɪ) oxide and CO2 gas
iron(ɪɪ) sulphate and water
Iron II sulphide can be obtained from magnetic iron oxide by
reduction then heating with S
reduction then passing dil H2S
oxidation then adding H2S
reduction then heating with S and reduction then passing dil H2S
To get FeCl3 from FeSO4
heating then add conc HCl
heating, reduction then add Cl2
heating then add Cl2 gas
heating then add conc HCl and heating, reduction then add Cl2
On heating rust > 200˚C then add conc HCl ……... is formed
FeCl2
FeCl3
no reaction
FeCl2 & FeCl3
Reduction of Fe2O3 over than 700˚C then, adding (dilute)HCl ………
FeCl3
FeCl2
no reaction
FeCl3 & FeCl2
Iron (II) oxide can be oxidized by the following except …………….
SO3
KMnO4
K2Cr2O7
H2
Heating iron (II) oxalate strongly over 700˚C in absence of air ………... is formed.
FeO
Fe
Fe2O3
Fe3O4
When steam is passed over red hot Fe forming (X) and (Y). What are (X) and
(Y)? ............
X : FeO
Y : H2
X : Fe3O4
Y : H2
X : Fe2O3
Y : CO
X : Fe3O4
Y : CO2
Impurities in iron obtained from blast furnace include C, P, S. Which
impurities are removed from molten iron as gases when it is changed into
steel? ………
C , P
C , S
C
P , S
Heating iron II Oxalate strongly in absence of air over than 700°C form….
Fe
FeO
Fe3O4
Fe2O3
On heating magnetic iron oxide in air, it is oxidized to……….
iron(ɪɪ) oxide
iron(ɪɪ) hydroxide
iron(ɪɪɪ) oxide
iron(ɪɪɪ) hydroxide
To get iron II sulphide from FeCl3
adding NaOH, heating > 200˚C, reduction then Δ/S
reduction, heating > 200˚C, adding NaOH then Δ/H2S
heating > 200˚C, reduction, heating/S then add NaOH
all
To get iron II chloride from iron II oxalate by
heating in absence of air, reduction then add dil HCl
heating in absence then add HCl
heating in absence of air, oxidation then add conc HCl
heating in absence of air, reduction then add dil HCl and heating in absence then add HCl
On heating iron II oxalate in absence of air then adding H2S ……. Is formed
FeS
Fe2S3
FeO
FeS and Fe2S3
On heating Fe2O3 with CO till 380˚C then, adding conc hot H2SO4 ……………
is (are) formed.
FeSO4
FeS
Fe2(SO4)3
FeSO4 & Fe2(SO4)3
These are 4 chemical equation :
(1) 3C + 2Fe2O3 3CO2 + W (2) 4FeS + 7O2 4SO2 + X
(3) CO + Y CO2 + Fe (4) 4Ca + Z 4CaO + 3Fe
Which of the following choices describes (W , (X) , (Y) and (Z) ? ………..
a
b
c
d
The opposite figures shows two iron chloride solutions .. which of the following statements is correct?
Solution (A) reacts with ammonium thiocyanate solution forming blood red solution.
Solution (A) is produced from dissolving the salt formed by the combination of iron with chlorine gas in water.
Solution (B) forms a white precipitate when ammonia solution is added to it.
Solution (B) is formed from the reaction of iron (III) oxide with hot concentrated hydrochloric acid.
