quiz 6 -  3sec iron properties .

quiz 6 - 3sec iron properties .

11th - 12th Grade

25 Qs

quiz-placeholder

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quiz 6 -  3sec iron properties .

quiz 6 - 3sec iron properties .

Assessment

Quiz

Chemistry

11th - 12th Grade

Hard

Created by

Marwan mamdouh

Used 4+ times

FREE Resource

25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

One of the following equations, iron III oxide acts as a base

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

Media Image

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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