One of the following equations, iron III oxide acts as a base
quiz 6 - 3sec iron properties .

Quiz
•
Chemistry
•
11th - 12th Grade
•
Hard
Marwan mamdouh
Used 4+ times
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25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Fe2O3 + CO →(400–700c) 2FeO + CO2
Fe2O3 + 6HCl →(conc.) 2FeCl3 + 3H2O
Fe2O3 +3H2 →(700c) 2Fe + 3H2O
3Fe2O3 + CO →(230–300c) 2Fe3O4 + CO2
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Which of the following alloys prevent the slipping of the layers over of each other?
Steel
Cementite
Duer alumin
Stainless steel
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The opposite figure is for one of iron oxides. Which of the following statements about this compounds 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
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
When Iron III oxide is heated in air , the percentage of oxygen ...
Increases
decreases
equal
slightly decreases
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
.......can be decomposed thermally
FeSO4
Fe(OH)3
Fe3O4
All the previous
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
No industrial products made of pure iron , the reason is all the following except…
pure iron is soft
pure iron is malleable
pure iron is ductile
pure iron has low melting point
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
When we heat a mixture of (FeO, Fe2O3) in air, the final product is …
FeO
Fe2O3
Fe3O4
FeCl2
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