VPR All-Russian Verification Work - Chemistry Grade 11

Explanations to the sample of the All-Russian verification work

When familiarizing yourself with the sample test work, it should be borne in mind that the tasks included in the sample do not reflect all the skills and content issues that will be tested as part of the All-Russian test work. A complete list of content elements and skills that can be tested in the work is given in the codifier of content elements and requirements for the level of training of graduates for the development of the All-Russian test work in chemistry. The purpose of the test work sample is to give an idea of ​​the structure of the All-Russian test work, the number and form of tasks, and their level of complexity.

Work instructions

The test work includes 15 tasks. To complete the work in chemistry, 1 hour 30 minutes (90 minutes) is allotted.
Prepare answers in the text of the work according to the instructions for the tasks. If you write down an incorrect answer, cross it out and write down a new one next to it.
When performing work, it is allowed to use the following additional materials:
– Periodic system of chemical elements D.I. Mendeleev;
- table of solubility of salts, acids and bases in water;
– electrochemical series of voltages of metals;
- non-programmable calculator.
When completing assignments, you can use a draft. Draft entries will not be reviewed or graded.
We advise you to complete the tasks in the order in which they are given. To save time, skip the task that you can't complete right away and move on to the next one. If after completing all the work you have time left, you can return to the missed tasks.
The points you get for completed tasks are summed up. Try to complete as many tasks as possible and score the most points.
We wish you success!

1. From the course of chemistry, you know the following methods for separating mixtures: sedimentation, filtration, distillation (distillation), magnet action, evaporation, crystallization. Figures 1-3 show examples of some of these methods.

Which of the following methods of separation of mixtures can be used for purification:
1) flour from iron filings that got into it;
2) water from inorganic salts dissolved in it?
Record in the table the number of the figure and the name of the corresponding method for separating the mixture.

iron filings are attracted by a magnet

during distillation, after the condensation of water vapor, salt crystals remain in the vessel

2. The figure shows a model of the electronic structure of an atom of some chemicalelement.

Based on the analysis of the proposed model, perform the following tasks:
1) determine the chemical element whose atom has such an electronic structure;
2) indicate the period number and group number in the Periodic system of chemical elements D.I. Mendeleev, in which this element is located;
3) determine whether a simple substance that forms this chemical element belongs to metals or non-metals.
Record your answers in a table.
Answer:

N; 2; 5 (or V); non-metal

to determine the chemical element, you should calculate the total number of electrons, which we see in figure (7)

taking the periodic table, we can easily determine the element (the number of electrons found is equal to the atomic number of the element) (N-nitrogen)

after that, we determine the group number (vertical column) (5) and the nature of this element (non-metal)

3. Periodic system of chemical elements D.I. Mendeleev- a rich repository of information about chemical elements, their properties and properties of their compounds, about the patterns of changes in these properties, about methods for obtaining substances, as well as about their presence in nature. So, for example, it is known that with an increase in the serial number of a chemical element in periods, the radii of atoms decrease, and in groups they increase.
Given these patterns, arrange the following elements in order of increasing atomic radii: N, C, Al, Si. Write down the designations of the elements in the correct sequence.

Answer: ____________________________

N → C → Si → Al

4. The table below lists the characteristic properties of substances that have a molecular and ionic structure.

Using this information, determine what structure the substances nitrogen N2 and table salt NaCl have. Write your answer in the space provided:

1) nitrogen N2 ________________________________________________________________
2) table salt NaCl _________________________________________________

nitrogen N2 - molecular structure;
table salt NaCl - ionic structure

5. Complex inorganic substances can be conditionally distributed, that is, classified, into four groups, as shown in the diagram. In this scheme, for each of the four groups, enter the missing group names or chemical formulas of substances (one example of the formulas) belonging to this group.

The names of the groups are recorded: bases, salts;
the formulas of the substances of the corresponding groups are written down

CaO, bases, HCl, salts

Read the following text and do tasks 6-8.

In the food industry, the food additive E526 is used, which is calcium hydroxide Ca (OH) 2. It finds application in the production of: fruit juices, baby food, pickles, table salt, confectionery and sweets.
Production of calcium hydroxide on an industrial scale is possible by mixing calcium oxide with water, this process is called quenching.
Calcium hydroxide has been widely used in the production of building materials such as whitewash, plaster and gypsum mortars. This is due to his ability interact with carbon dioxide CO2 contained in the air. The same property of a calcium hydroxide solution is used to measure the amount of carbon dioxide in the air.
A useful property of calcium hydroxide is its ability to act as a flocculant that purifies wastewater from suspended and colloidal particles (including iron salts). It is also used to raise the pH of water, since natural water contains substances (for example, acids), causing corrosion in plumbing pipes.

1. Write a molecular equation for the reaction to produce calcium hydroxide, which
mentioned in the text.

2. Explain why this process is called quenching.
Answer:__________________________________________________________________________

________________________________________________________________________________

1) CaO + H 2 O \u003d Ca (OH) 2
2) When calcium oxide interacts with water, a large amount of
the amount of heat, so the water boils and hisses, as if it hits hot coal, when the fire is extinguished with water (or “extinguishing this process is called because slaked lime is formed as a result”)

1. Write a molecular equation for the reaction between calcium hydroxide and carbon dioxide
gas, which was mentioned in the text.
Answer:__________________________________________________________________________

2. Explain what features of this reaction make it possible to use it to detect
carbon dioxide in the air.
Answer:__________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________

1) Ca(OH) 2 + CO 2 = CaCO 3 ↓ + H 2 O
2) As a result of this reaction, an insoluble substance is formed - calcium carbonate, clouding of the initial solution is observed, which makes it possible to judge the presence of carbon dioxide in the air (qualitative
reaction to CO 2)

1. Make an abbreviated ionic equation of the reaction mentioned in the text between
calcium hydroxide and hydrochloric acid.
Answer:__________________________________________________________________________

2. Explain why this reaction is used to increase the pH of water.
Answer:__________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________

1) OH - + H + = H 2 O (Ca(OH) 2+ 2HCl = CaCl2 + 2H2O)
2) The presence of acid in natural water causes low pH values ​​of this water. Calcium hydroxide neutralizes the acid and pH values ​​rise

The pH scale exists from 0-14. from 0-6 - acidic environment, 7 - neutral environment, 8-14 - alkaline environment

9. The scheme of the redox reaction is given.

H 2 S + Fe 2 O 3 → FeS + S + H 2 O

1. Make an electronic balance of this reaction.
Answer:__________________________________________________________________________

2. Specify the oxidizing agent and reducing agent.
Answer:__________________________________________________________________________

3. Arrange the coefficients in the reaction equation.
Answer:__________________________________________________________________________

1) Compiled electronic balance:

2Fe +3 + 2ē → 2Fe +2	2		1
		2
S -2 - 2ē → S 0	2		1

2) It is indicated that sulfur in the oxidation state –2 (or H 2 S) is a reducing agent, and iron in the oxidation state +3 (or Fe 2 O 3) is an oxidizing agent;
3) The reaction equation is composed:
3H 2 S + Fe 2 O 3 \u003d 2FeS + S + 3H 2 O

10. The scheme of transformations is given:

Fe → FeCl 2 → Fe(NO 3) 2 → Fe(OH) 2

Write the molecular reaction equations that can be used to carry out
indicated transformations.
1) _________________________________________________________________________
2) _________________________________________________________________________
3) _________________________________________________________________________

The reaction equations corresponding to the transformation scheme are written:
1) Fe + 2HCl = FeCl 2 + H 2
2) FeCl 2 + 2AgNO 3 \u003d Fe (NO 3) 2 + 2AgCl
3) Fe(NO 3) 2 + 2KOH = Fe(OH) 2 + 2KNO 3
(Other ones that do not contradict the condition of setting the equation are allowed
reactions.)

11. Establish a correspondence between the formula of organic matter and the class / group to which this substance belongs: for each position indicated by a letter, select the corresponding position indicated by a number.

Write in the table the selected numbers under the corresponding letters.
Answer:

BUT	B	IN

1. C3H8 - CnH2n + 2 - alkane
2. C3H6 - CnH2n- alkene
3. C2H6O - CnH2n + 2O- alcohol

12. In the proposed schemes of chemical reactions, insert the formulas of the missing substances and arrange the coefficients.

1) C 2 H 6 + ……………..… → C 2 H 5 Cl + HCl
2) C 3 H 6 + ……………..… → CO 2 + H 2 O

1) C 2 H 6 + Cl 2 → C 2 H 5 Cl + HCl
2) 2C 3 H 6 + 9O 2 → 6CO 2 + 6H 2 O
(Fractional odds are possible.)

13. Propane burns with low emissions of toxic substances into the atmosphere, therefore it is used as an energy source in many areas, for example, in gas lighters and for heating country houses.
What volume of carbon dioxide (N.O.) is formed during the complete combustion of 4.4 g of propane?
Write down a detailed solution to the problem.
Answer:__________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________

1) An equation for the reaction of propane combustion was compiled:
C 3 H 8 + 5O 2 → 3CO 2 + 4H 2 O
2) n (C 3 H 8) \u003d 4.4 / 44 \u003d 0.1 mol
n (CO 2) \u003d 3n (C 3 H 8) \u003d 0.3 mol
3) V (O 2) \u003d 0.3 22.4 \u003d 6.72 l

14. Isopropyl alcohol is used as a universal solvent: it is part of household chemicals, perfumes and cosmetics, windshield washer fluids for cars. In accordance with the scheme below, make up the equations for the reactions for obtaining this alcohol. When writing reaction equations, use the structural formulas of organic substances.

1) _______________________________________________________
2) _______________________________________________________
3) _______________________________________________________

The reaction equations are written corresponding to the scheme:

(Other ones are allowed that do not contradict the condition of setting the reaction equation.)

15. Physiological saline in medicine is called a 0.9% solution of sodium chloride in water. Calculate the mass of sodium chloride and the mass of water required to prepare 500 g of saline. Write down a detailed solution to the problem.
Answer:__________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________

1) m(NaCl) = 4.5 g
2) m(water) = 495.5 g

m(r-ra) = 500g m(salt) = x

x/500 * 100%= 0.9%

m(salts) = 500* (0.9/100)= 4.5 g

© 2017 Federal Service for Supervision in Education and Science of the Russian Federation

The manual presents 10 options for test papers in chemistry for 8th grade students. Each test work contains 10 tasks that cover all the main topics of the chemistry course in the 8th grade of educational institutions. All tasks are given answers and a detailed system for evaluating their performance. The workshop is necessary for students of the 8th grade, teachers and methodologists who use standard tasks to prepare for the All-Russian test work.
The test work includes 10 tasks. You have 60 minutes to complete the chemistry work.
When performing work, it is allowed to use the following additional materials:
- Periodic system of chemical elements D.I. Mendeleev;
- table of solubility of salts, acids and bases in water;
- electrochemical series of voltages of metals;
- non-programmable calculator.

VLOOKUP. Chemistry. 8th grade. Workshop. Kuptsova A.V., Koroshchenko A.S.

Description of the tutorial

In this textbook, the authors offer options for VPR in chemistry for grade 8, the content of which is determined on the basis of the Federal component of the state educational standard for basic general education in chemistry, the basic level (Order of the Ministry of Education of Russia dated March 05, 2004 No. 1089 “On approval of the Federal component of state standards for elementary general, basic general and secondary (complete) general education”). When creating options for verification work, the approaches used by the developers of the VPR in chemistry for grade 11 were also taken into account.
Each VLOOKUP variant contains 10 tasks of various types aimed at checking:
- knowledge and understanding of the meaning of chemical concepts, quantities, laws, descriptions and explanations of the properties of substances and chemical phenomena;
- practical use of chemical knowledge;
- perception and use of various types of information (texts, diagrams, tables, figures, diagrams, etc.).
Test tasks differ in the form of recording the answer. The answer, for example, can be: a sequence of numbers, symbols; words; formulas of substances; reaction equations; problem solving. Each task has a place to record the correct answer.
The work is carried out according to the instructions.
You have 60 minutes to complete the entire test.
OPTION 1
To study the surrounding world, various methods of cognition are used, for example, observation, measurement, experiment.
Name a method that can be used to:
1) describe the structure of the flame;
2) prepare a syrup, the mass fraction of sugar in which is 25%.
Indicate the numbers of the figures corresponding to the methods to be applied in each of the above examples.



2) indicate the number of the period and the number of the group in the Periodic system of chemical elements of D. I. Mendeleev, in which this element is located;
3) make a formula for the higher oxide that this element forms.



With an increase in the charge of the nucleus of an atom of a chemical element in periods, the radius of atoms is _, and in groups -.
Given the patterns formulated in the above proposal, arrange the chemical elements in order of increasing radius: aluminum, silicon, magnesium, sodium.

2) sylvinite -

A) compound reaction B) substitution reaction
B) exchange reaction
D) decomposition reaction
1) Qualitative sulfation reaction
2) burning hydrogen
3) obtaining copper (II) oxide from copper (II) hydroxide
4) obtaining hydrogen from hydrochloric acid
Write in the table the selected numbers under the corresponding letters. Answer:
Complex inorganic substances can be classified by composition into groups, for example, as shown in the diagram.
In each empty cell of the scheme, write the missing name of the group or the chemical formula of the substance belonging to this group.
To prepare "raw jam" from blackcurrant, pureed berries and granulated sugar are mixed. What will be the mass fraction of sugar in jam prepared by mixing 1 kg of berries and 1.5 kg of sugar?
Write down the detailed solution of the problem and the answer. Write your answer as a percentage.
I
In the table "Chemical properties of sodium compounds":
1) Arabic numerals are used to indicate the numbers of reagents (they are written in the first line and first column of the table);
2) Roman numerals are used to designate the numbers of the product(s) of the reaction (they are written on a gray background).
1) Write in all the names of the reagents that are missing in the table (in the cells next to the Arabic numerals).
2) Write in all the names of the reaction products that are missing in the table (in cells on a gray background next to Roman numerals).
1) Write an equation for the reaction between reagents 4 and 6.
2) Write an equation for the reaction between reagents 1 and 5. Answer:__
If a piece of sodium is placed in a vessel filled with water, a vigorous evolution of hydrogen will occur. Determine how much sodium hydroxide is formed when 0.23 g of sodium reacts with water.
OPTION 2
From the course of chemistry, you know the various methods of separating mixtures, for example, the action of a magnet, settling, distillation (distillation), evaporation, filtration, crystallization.
Figures 1-3 show situations in which some of these methods are applied.
Name a method by which a mixture consisting of:
1) from sunflower oil and water;
2) from iron and copper shavings.
Indicate the numbers of the figures corresponding to the methods to be applied in each of the above examples.
The figure shows a model of the structure of an atom of a certain chemical element.
Based on the analysis of the proposed model:
1) determine the chemical element whose atom has such a structure;
2) indicate the period number and group number in the Periodic system of chemical elements D.I. Mendeleev, in which this element is located;
3) determine whether a simple substance that forms this chemical element belongs to metals or non-metals.
In the Periodic system of chemical elements D.I. Mendeleev systematized information about chemical elements, their properties and properties of their compounds, about the patterns of change in these properties.
Read the sentence and fill in the missing words:
decreases, increases, does not change. Words in the answer may be repeated.
With an increase in the charge of the nucleus of an atom of a chemical element in periods, electronegativity is _, and in groups -_.
Given the patterns formulated in the above proposal, arrange the chemical elements in order of increasing electronegativity: iodine, chlorine, fluorine, bromine.
Write down the symbols of the indicated chemical elements in the correct sequence.
Answer:_
Only a few chemical elements do not form chemical bonds with other chemical elements. The chemical bond can be classified into types, as shown in the diagram.
In each empty cell of the diagram, enter the missing name of the type of chemical bond or the chemical formula of the substance formed by this type of chemical bond.
Match the type of chemical reaction with its description.

VLOOKUP. Chemistry. 8th grade. Workshop.

Structure

Each version of the VPR in chemistry contains 15 tasks of various types and levels of complexity.

The work contains 4 tasks of an increased level of complexity (their serial numbers: 9, 10, 13, 14).

The tasks included in the work can be conditionally divided into four content blocks: “Theoretical foundations of chemistry”, “Inorganic chemistry”, “Organic chemistry”, “Methods of knowledge in chemistry. Experimental foundations of chemistry. Chemistry and Life.

Explanations for grading assignments

The correct performance of the task with serial number 3 is estimated at 1 point.

The correct performance of each of the remaining tasks of the basic level of complexity is estimated at a maximum of 2 points. If there is one mistake or incomplete answer, 1 point is given. The rest of the answers are considered incorrect and are evaluated at 0 points.

Assessing tasks of an increased level of complexity is carried out on the basis of an element-by-element analysis of students' answers. The maximum score for a correctly completed task is 3 points. Questions with a detailed answer can be completed by students in different ways. Therefore, the sample solutions given in the evaluation criteria should be considered only as one of the possible answers.

In 2018, VPR in chemistry in grade 11 was carried out by the decision of the educational organization, for graduates who did not choose this subject for passing the exam.

The 2018 versions will come in handy to prepare for the 2019 CDF.

VPR in chemistry grade 11 2018 options + answers

The verification work in chemistry is conditionally divided into four content blocks: “Theoretical Foundations of Chemistry”, “Inorganic Chemistry”, “Organic Chemistry”, “Methods of Learning Chemistry. Experimental foundations of chemistry. Chemistry and Life.

Graduates taking part in the writing of the VLOOKUP in chemistry must demonstrate a basic level of knowledge of the subject:

• write an equation for a chemical reaction
• simulate a chemical experiment based on its description,
• explain the conditionality of the properties and methods of obtaining substances by their composition and structure.

Test work for grade 11 includes 15 tasks of various levels of complexity.

1.5 hours (90 minutes) are given to complete the entire work.

The tasks included in the test work check mastery
graduates with certain skills and methods of action that
meet the requirements for the level of training of graduates.

Table for converting the scores of the VLOOKUP of chemistry to the assessment

VLOOKUP. Chemistry. Grade 11. 10 options for typical tasks. Drozdov A.A.

M.: 20 1 7. - 9 6 p.

This manual fully complies with the federal state educational standard (second generation). The book contains 10 variants of typical tasks of the All-Russian Testing Work (VPR) in chemistry for 11th grade students. The collection is intended for 11th grade students, teachers and methodologists who use standard tasks to prepare for the All-Russian test work in chemistry.

Format: pdf

Size: 3.4 MB

Watch, download:drive.google

Work instructions, 4
Option 1 5
Option 2 12
Option 3 19
Option 4 26
Option 5 33
Option 6 40
Option 7 47
Option 8 54
Option 9 61
Option 10 68
Assessment system for test work 75
Answers 76
Applications 93

The test work includes 15 tasks. To complete the work in chemistry, 1 hour 30 minutes (90 minutes) is allotted.
Prepare answers in the text of the work according to the instructions for the tasks. If you write down an incorrect answer, cross it out and write down a new one next to it.
When performing work, it is allowed to use the following additional materials:
- Periodic system of chemical elements D.I. Mendeleev;
- table of solubility of salts, acids and bases in water;
- electrochemical series of voltages of metals;
- non-programmable calculator.
When completing assignments, you can use a draft. Draft entries will not be reviewed or graded.
We advise you to complete the tasks in the order in which they are given. To save time, skip the task that you can't complete right away and move on to the next one. If after completing all the work you have time left, you can return to the missed tasks.
The points you get for completed tasks are summed up. Try to complete as many tasks as possible and score the most points.