Test on the topic “Iron and its compounds”
Part A. Multiple Choice Questions
A1. For substances with a metal crystal lattice, an uncharacteristic property is:
a) thermal conductivity; b) plasticity;
c) low boiling point; d) electrical conductivity.
A2. The distribution of electrons in an iron atom corresponds to a series of numbers:
a) 2, 8, 13, 3; b) 2, 8, 6, 10;
c) 2, 8, 16; d) 2, 8, 14, 2.
A3. Indicate the number of unpaired electrons in the ground state of the iron atom:
a) 2; b) 3; at 4; d) 1.
A4. Sodium hexahydroxoferrate(III) has the formula:
a) Na2; b) Na;
c) Na3; d) NaFeO2.
A5. Oxidation state of iron in the FeO42– ion:
a) +3; b) +2; c) 0; d) +6.
A6. Red blood salt solution is a reagent for the detection of:
a) Fe3+; b) Fe2+; c) Fe3O4; d) Fe0.
A7. In the reaction of iron (II) oxide with carbon, the oxidizing agent is:
a) C0; b) O2–; c) Fe2+; d) Fe0.
A8. The oxidation of iron(II) hydroxide in moist air produces:
a) iron(II) oxide; b) iron(III) oxide;
c) iron(III) hydroxide; d) iron.
A9. In the transformation scheme
substances A, B, C are respectively:
a) H2O, NaOH, AgNO3; b) NaOH, NaCl, AgNO3;
c) H2O, HCl, AgNO3; d) NaOH, HCl, AgNO3.
A10. On which plate (iron or silver) will a red coating appear when placed in a solution of copper(II) sulfate?
a) on the railway; b) on both;
c) none; d) on silver?
Part B. Short answer questions
IN 1. The chemical element iron is represented in nature by the following isotopes: 54Fe, 56Fe, 57Fe, 58Fe. The atoms of all these isotopes contain in their nuclei……. protons.
AT 2. Which of the following substances will iron(III) oxide react with:
1) carbon monoxide (IV);
2) sodium;
3) sulfuric acid solution;
5) molten sodium hydroxide;
7) carbon monoxide (II)?
Write down their numbers in ascending order.
AT 3. The transformation scheme is given:
Indicate the number of the reaction during which the precipitate occurs and the absolute value of the charge of the cation on the left side of the abbreviated ionic equation. Write the answer in numbers.
1. The number of electrons in the outer level in an iron atom...
2. The number of d-electrons in the iron atom in the ground state...
3. The number of energy levels in an atom of element No. 26...
4. The number of protons in an iron isotope with a relative atomic mass of 57 ...
5. The total number of electrons in the Fe2+ ion...
6. The oxidation state of iron in potassium ferrate...
8. The place of iron in terms of prevalence in nature among metals...
9. When iron burns in pure oxygen,...
10. What acid can be stored in iron containers?
11. The product of the interaction of iron with molecular chlorine...
12. Oxidation product in the reaction between iron and concentrated nitric acid when heated...
13. The product of the interaction of iron with a solution of hydrochloric acid ...
14. The nature of iron(II) oxide...
15. Physical state of iron(III) oxide...
16. What properties of iron(III) oxide prove its interaction with molten sodium hydroxide?
17. Formula of ferrous acid...
18. Oxidation states of iron in magnetite...
19. How do the basic properties of oxides change with increasing oxidation state of iron?
20. In air in the presence of moisture, the oxidation state of iron increases from 0 to ... (+3)
22. A protein that contains iron and is involved in gas exchange in the animal body...
22. A disease caused by a lack of iron in human blood...
Chemical maze
After going through the stages of the maze, you will identify a keyword consisting of 10 letters.
Rules of the game
The game begins with a cell in which the word “Start” is underlined. Therefore, the first letter of the keyword (it is in the circle) is “g”. Read and answer the question formulated in this cell of the maze.
Find the answer among the underlined numbers and formulas in other cells of the maze.
The circled letter in this cell is the second letter in the keyword.
Continue the game until you complete the keyword.
Iron was first discovered in human blood in the 19th century. This discovery became a real sensation. A sad fact is known when a chemistry student in love decided to give the chosen one of his heart a ring made from the iron of his own blood. By periodically releasing blood, the young man received a compound from which he then chemically extracted iron. The poor fellow died of anemia, never having collected the iron needed to make the ring. Why? The fact is that the iron content in human blood is about 4–7 g, i.e. very small.
9 Chemistry Test: Iron and its compounds
1. The position of an element having the following electron distribution 2,8,14,2 in PSHEA) 4th period, 8th group main subgroup
B) 3rd period, 2nd group, main subgroup
B) 4th period, 8th group secondary subgroup
D) 4th period, 2nd group, secondary subgroup
1.Distribution of electrons by energy levels in the iron atom
A)2,8,8,2 B)2,8,14,2 C)2,8,18,2 D)2,8,8,8
2. Formula of the main oxide:
A) CO 2 B) FeO C) AI 2 O 3 D) ZnO
2Formula of compounds in which iron respectively exhibits oxidation state values of +2,+2,+3
A) Fe(OH) 3 : FeCI 3 : FeSO 4
B)FeS: FeO: Fe(OH) 3
D) FeO: Fe 2 O 3 : Fe (OH) 2
3.Values of oxidation states in compounds
Fe (OH ) 2 : Fe 2 O 3 : Fe 2 (SO 4 ) 3 , respectively equal
A) +2:+2:+3 B)+3:+2:+3 C) +2:+3;+3 D)+1:+3;+3
3. Final product of reaction X 2 in the transformation scheme
Fe 2 O 3 → X 1 → X 2
A) Fe(OH) 2 B) FeCI 2 C) FeCI 3 D) Fe(OH) 3
4. Fe 2+
A) potassium thiocyanate
B) red blood salt
B) yellow blood salt
D) barium chloride
4. Substance that does not react with iron
A) oxygen B) chlorine
C) nitric acid (conc.) D) sulfur
5.Hydrogen is released in a chemical reaction between substances
A) Cu + HNO 3 (conc.) B) Fe + H 2 SO 4 (diluted)
B) Zn + HNO 3 (diluted) D) Ag + H 2 SO 4 (diluted)
5. Iron hydroxide (III ) can be obtained
A)Fe(OH) 2 +O 2 +H 2 O=
B) Fe 2 O 3 +H 2 O=
B)FeS +KOH=
D)Fe + NaOH=
6. To carry out transformations
Fe → FeCI 3 → Fe (OH ) 3
substances must be used consistently
A) CI 2 and NaOH B) CI 2 and Mg (OH) 2
C) HCI and KOH D) HCI and Ba (OH) 2
6.Iron oxide (III ) exhibits:
A) basic properties
B) acidic properties
B) amphoteric properties
D) does not exhibit properties
7. Iron is passivated
A) concentrated cold hydrochloric acid
B) concentrated cold sulfuric acid
B) hot dilute sulfuric acid
D) hot dilute hydrochloric acid
7. Identify the oxidizing agent in the reaction scheme
Fe 2 O 3 + AI = Fe + AI 2 O 3
A) Fe 0 B) AI 0 C) Fe 3+ D) AI 3+
8. Reaction equation in which iron is the reducing agent
A)FeO +H 2 SO 4 =FeSO 4 +H 2 O
B)FeCI 2 +2KOH=Fe(OH) 2 +2HCI
B) 2Fe + 3CI 2 = 2FeCI 3
D) 2Fe(OH) 3 =FE 2 O 3 +3H 2 O
8.A reagent that can be used to determine ionsFe 3+
A) potassium thiocyanate
B) red blood salt
B) yellow blood salt
D) barium chloride
9. Formula of the product of the reaction of iron with water vapor at high temperature (700 -900 0 WITH)
A) FeO B) Fe 2 O 3 C) Fe 3 O 4 D) Fe (OH) 2
9.When interacting with chlorine and hydrochloric acid, iron forms, respectively:
A) FeCI 2 : FeCI 2 B) FeCI 3 : FeCI 3
C) FeCI 3 : FeCI 2 D) FeCI 2 : FeCI 3
10.Pyrite formula:
10.Formula of iron sulfate:
A) FeS B) Fe 3 O 4 C) Fe 2 O 3 D) FeSO 4 * 7H 2 O
A) Fe 2 O 3 and HNO 3 1) FeCI 3
B) Fe and HCI 2) Fe (OH) 2 and NaCI
B) FeCI 3 and NaOH 3) Fe (NO 3) 3 and H 2 O
4) Fe(OH) 3 and NaCI
5) FeCI 2 and H 2
1. Establish a correspondence between the starting materials and reaction products:
Starting materials Reaction products
A) Fe and CuSO 4 1) FeCI 3
B) Fe (OH) 2 and HCI 2) Fe (OH) 2 and NaCI
B) Fe + CI 2 3) Fe(SO 4 ) 3 and H 2 O
4) FeSO 4 and Cu
5) FeCI 2 and 2H 2 O
2.TransformationFe 0 → Fe 2+ can be accomplished by the interaction of iron with
B) sodium hydroxide solution
B) dilute sulfuric acid
D) concentrated sulfuric acid
D) chlorine
Write down possible reactions .
2.Iron hydroxide(II ) reacts with
A) alkali solution
B) with water
B) with oxygen and water
D) with copper sulfate solution
D) with a solution of sulfuric acid
Write down the reaction equations
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GDZ control and measuring materials (KIM) in chemistry, grade 9 Strelnikova Vako
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The test lasts 20-25 minutes and allows you to check your level of knowledge on the topic. Can be used as homework in preparation for the test
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"Test on the topic "Iron""
Iron
1. Electronic diagram 2e 8e 14e 2e corresponds to an atom of an element with atomic number: a) 15 b) 18 c) 26 d) 22
2. Not restored iron from compounds:
a) hydrogen and aluminum b) nickel and lead
c) magnesium and carbon monoxide (II) d) carbon and aluminum
3. Iron (II) chloride can be obtained by reacting a pair of substances whose formulas are:
a) Fe and Cl 2 b) Fe and MgCl 2 c) Fe and HCl d) FeO and KCl
4. Iron reacts with substances of the composition:
a) HgCl 2 b) Al 2 (SO 4) 3 c) H 2 SO 4 (diluted) d) O 2
Write the equations for the reactions that occur
5. Make up equations for the following transformations:
Fe 3 O 4 → Fe → FeCl 3 → Fe(NO 3) 3
Parse Equation 2 as OVR. For reaction 3, write the molecular and abbreviated ion-molecular equations
6. The reaction whose equation Fe + S = FeS + 95.4 kJ is the reaction:
a) ORR, exothermic, reversible
b) exothermic, irreversible, ion exchange
c) decomposition, irreversible, exothermic
d) irreversible, exothermic, ORR
7. Complete the equations of possible reactions:
a) Fe + H 2 O (steam) → b) Fe 2 O 3 + CO →
c) Fe + H 2 SO 4 (conc.) → d) Fe + H 2 SO 4 (diluted) →
Arrange the coefficients using the electronic balance method, indicate the oxidizing agent and reducing agent
8. To separate a mixture of river sand, iron filings and water, you need to use sequentially: a) filtration b) evaporation c) settling d) magnet action
9. Calculate the volume of chlorine (no.) required for the oxidation of iron weighing 7 g.