Lesson Worksheet: Properties and Reactions of Iron and Iron Oxides Chemistry

In this worksheet, we will practice describing the properties and reactions of iron and its oxides.

Q1:

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?

Iron III oxide powder in a glass petri dish
  • AFe(OH)3
  • BFeO23
  • CFeO
  • DFeSO4
  • EFeCl3

Q2:

Considering the electronic configuration of iron metal represented in the diagram, what is the electronic configuration of the Fe2+ ion?

  • A
  • B
  • C
  • D
  • E

Q3:

There is significant diversity in the physical and chemical properties of the most common iron oxides: iron(II) oxide, iron(III) oxide, and iron(II,III) oxide.

Which of the iron oxides is ferrimagnetic?

  • AFeO
  • BFeO23
  • CFeO34

Which of the iron oxides has the following crystalline structure?

  • AFeO34
  • BFeO
  • CFeO23

Which of the iron oxides occurs naturally in the mineral hematite?

Iron(III) Oxide Sample
  • AFeO
  • BFeO34
  • CFeO23

Q4:

Which of the following properties is not correct for pure iron?

  • APure iron is easily pulled or stretched into a thin wire.
  • BPure iron has a shining luster.
  • CPure iron is very soft with low hardness.
  • DPure iron has a low melting point.
  • EPure iron has magnetic properties.

Q5:

What is the most abundant transition element in Earth’s crust?

  • ACopper
  • BChromium
  • CIron
  • DManganese
  • EZinc

Q6:

Which of the following is the resulting product from the reaction of iron with sulfur?

  • AFeS()s
  • BFeS()32s
  • CFeS+FeS()23s
  • DFeS()23s
  • EFeS+FeS()32s

Q7:

Which of the following statements is correct?

  • AIron can be dissolved in diluted hydrochloric acid, producing iron(III) chloride and water.
  • BIron can be dissolved in diluted hydrochloric acid, producing iron(II) chloride and hydrogen gas.
  • CIron can be dissolved in diluted hydrochloric acid, producing iron(II) chloride and water.
  • DIron can be dissolved in diluted hydrochloric acid, producing iron(III) chloride and hydrogen gas.

Q8:

Hematite is one of the most important iron ores. What is its chemical formula?

  • AFeO23
  • B2FeO·3HO232
  • CFeO34
  • DFeCO3
  • EFeO

Q9:

Iron(II) oxide can be fully oxidized in dry hot air to give which of the following iron compounds?

  • AFeO23
  • BFeO34
  • CFe(OH)2
  • DFeO
  • EFe(OH)3

Q10:

Which of the following is the correct balanced symbolic equation showing the reaction of iron with hot concentrated sulfuric acid?

  • A3Fe()+8HSO()FeSO()+Fe(SO)()+4SO()+8HO()slaqaqgg24424322
  • B2Fe()+5HSO()FeSO()+Fe(SO)()+4SO()+8HO()slaqaqgg24424322
  • C4Fe()+8HSO()FeSO()+Fe(SO)()+4SO()+8H()slaqaqgg242424322
  • DFe()+HSO()FeSO()+H()slaqg2442
  • E4Fe()+9HSO()FeSO()+Fe(SO)()+4SO()+8HO()slaqaqgg242434422

This lesson includes 18 additional questions and 6 additional question variations for subscribers.

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