We are launching a special project for ninth-graders, where children who have gone through all the difficulties will tell their stories about passing the OGE and give advice on what to pay attention to when preparing.
Mikhail Sveshnikov: “We started preparing in November, solving problems, considering the structure of the exam. It was a long time before May, and I didn't worry too much. Usually we did one task in different tests (it really helps) and did tasks from the second part. By the exam, we had about 15-20 solutions.
For me, the most difficult was to determine the formula of the substance according to the description and write the reaction - the last task. At the trial OGE, I did not always solve it correctly. The day before, I tried to repeat everything as much as possible. On the day of the exam, I was not very worried, because it was the last one and did not affect the certificate, but I did not want to write badly either.
When they gave me the KIM, I was confused, because the option turned out to be very difficult, but I immediately began to complete the tasks that I knew. I didn't manage to solve that last task.
It seems to me that you need to start preparing three to four months before the OGE (you won’t forget much), solve more tasks from the second part, because, as a rule, the first part is easier than in manuals. And the last thing is to be confident in yourself.
Uliana Kis: “I prepared a lot for the exam. I studied every subject, did all my homework, went to electives, where we solved many tests and samplers.
Of course, there were experiences, because every teacher said that it would be very difficult, you had to prepare day and night, you should go to tutors. But I am independent, and I studied everything that was incomprehensible at home, with the help of video tutorials and various sites.
And then that day was approaching. We had a four-hour consultation where our brains were in full swing, perhaps also because it was summer. We analyzed all the tasks ten times and were very worried.
On the day of the OGE, we went to take it to another school, we all tremble with fear, we come, we show our passport, we check in, we are assigned to classrooms, they open assignments in front of us and distribute them, and ... Everything turned out to be so simple. Nobody expected this. We got the tasks that we analyzed in the first three electives. Everything is elementary, and with us sat curators who did not follow your every move, as happened in other exams.
The most important thing is to be calm and confident, not to listen to those who want to intimidate you.
I advise you to prepare on your own, without tutors who have to pay large sums.
For the exam, you can write a spur - a small leaf with the most important, for example, formulas. If you decide to use it, you can go to the toilet, look and remember what you forgot.
For those who do not want to prepare or do not understand anything, on the day of the exam, answers are posted on various sites and in groups. For insurance, you can take them with you.
Artem Gurov: “I didn’t put much effort into preparation – an hour a week of extra chemistry classes, half of which I didn’t show up. I began to actively prepare at the last moment, two or three days before the exam. I can’t say that I was very worried, because there was an inexplicable inner confidence.
Some emotions appeared in me an hour before the exam, at the same time I began to understand what could happen if I did not pass it. Fear left me half an hour after the start of the exam, when some "euphoria" had passed.
The only thing I can advise ninth graders is to prepare in advance. Unfortunately, without it, nowhere.”
Option
control measuring materials for preparation
to the state (final) certification
on CHEMISTRY students who have mastered
basic general education programs of the basic
general education.
This training test is designed for graduates of grade 9 who are going to take the OGE in the subject of chemistry.
Target: checking knowledge in chemistry for the course of the main school, to identify the level of preparation of students for the OGE.
Difficulty level: basic, advanced, high
Compiled by: Samarchenko Natalya Vasilievna teacher of chemistry and biology - the highest category
Work instructions
2 hours (120 minutes) are given to complete the work. The work consists of 2 parts containing 22 tasks.
Part 1 contains 19 tasks. For each task (1–15), 4 possible answers are given, of which only one is correct. When completing Part 1, circle the number of the selected answer in the examination paper. If you circled the wrong number, cross out the circled number with a cross, and then circle the number of the correct answer.
(16–19) consists of 4 tasks for which you need to give a short answer in the form of a set of numbers.
Part 2 includes 3 tasks (20, 21, 22), the completion of which involves writing a complete, detailed answer, including the necessary reaction equations and calculations. Answers to the tasks of part 2 are written on a separate sheet.
The points received by students for completing all tasks are summed up. The final assessment of a graduate of a basic school is determined on a 5-point scale: 0-7 points - "2", 9-14 points "3"; 15-19 points "4"; 20-22 points "5".
When doing work, you can use the periodic system of chemical elements D.I. Mendeleev, a table of the solubility of salts, acids and bases in water, an electrochemical series of metal voltages and a non-programmable calculator.
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 you have time left after completing all the work, you can return to the missed tasks. The points you get for all completed tasks are summed up. Try to complete as many tasks as possible and score as many points as possible.
We wish you success!
Part 1
For each of tasks 1–15, 4 answers are given, of which only one is correct. Circle the number of the correct answer.
1 . The number of electrons in the outer electron layer of an atom with a nuclear charge of +9 is?
2. From acidic to amphoteric, do the properties of oxides change in the series?
1) CaO → SiO 2 → SO 3
2) CO 2 → Al 2 O 3 → MgO
3) SO 3 → P 2 O 5 → Al 2 O 3
4) Na 2 O → MgO → Al 2 O 3
3. Which of the following substances has a polar covalent bond?
4. The same oxidation state as in SO 3, sulfur has in the compound
5. Acid oxide and acid, respectively, are?
CO 2 , (NH 4) 2 S
6. Is a process a chemical phenomenon?
Candied jam
Scale formation in the kettle
Water evaporation
Turning water into ice
7. 3 mol of cations are formed upon complete dissociation of 1 mol
sodium phosphate
aluminum nitrate
Iron(III) chloride
calcium hydroxide
8. What equation corresponds to the exchange reaction?
2H 2 S + 3O 2 \u003d 2SO 2 + 2H 2 O
2HCl + Ca(OH) 2 = CaCl 2 + 2H 2 O
Zn + 2HCl \u003d ZnCl 2 + H 2
9. Both sodium and copper react with
sodium hydroxide
Hydrogen
nitric acid
10. Is a chemical reaction possible between?
barium oxide and sodium hydroxide
Barium oxide and water
silicon oxide and water
silicon oxide and hydrochloric acid
11 . Oxygen does not react with
Carbon monoxide (IV)
hydrogen sulfide
Phosphorus (III) oxide
ammonia
12. Reacts with hydrochloric acid
magnesium oxide
hydrogen sulfide
barium sulfate
13. Are the following statements about pure substances and mixtures correct?
A. Mineral water is a pure substance.
B. Perfume is a mixture of substances.
1) only A is true
2 ) only B is true
3) both statements are correct
4) both judgments are wrong
14. Which of the substances corresponds to the general formula C n H 2 n
15. What is the mass fraction of oxygen in nitric acid?
When completing tasks 16-17 from the proposed list of answers, select two correct ones and circle their numbers. Write the numbers of the selected answers in the indicated place without additional characters.
16. In the series of chemical elements Si - P - S
1) the number of protons in the nucleus decreases
2) electronegativity decreases
3) the number of electrons in the outer electron layer increases
4) the radius of atoms increases
5) enhanced non-metallic properties
Answer: ___________.
17. Among the characteristics listed below, select those that apply to oil:
Odorless liquid
Not soluble in water
Has a specific boiling point
Its components serve as food for some bacteria.
Dissolves in water
Answer: ___________.
18. Establish a correspondence between the transformation scheme and the degree change
oxidation of the reducing agent in it.
| STARTING SUBSTANCES | REACTION PRODUCTS |
||
| A) Fe 2 O 3 + CO → Fe + CO 2 | 1) E -1 → E 0 | ||
| B) Al 2 S 3 + HNO 3 → Al 2 (SO 4) 3 + NO 2 + H 2 O | 2) E +3 → E +2 | ||
| C) HNO 2 + HI → I 2 + NO + H 2 O | 3) E +5 → E +4 | ||
| 4) E +2 → E +4 |
|||
| 5) E -2 → E +6 |
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Answer:
| Establish a correspondence between the starting materials and the products of the reaction. STARTING SUBSTANCES | REACTION PRODUCTS |
||
| A) H 2 S + O 2 → | |||
| B) H 2 SO 3 + Na 2 O → | 2) → SO 2 + H 2 O | ||
| C) H 2 SO 4 + NaOH → | 3) → Na 2 SO 4 + H 2 | ||
| 4) → Na 2 SO 4 + H 2 O |
|||
| 5) → Na 2 SO 3 + H 2 O |
|||
Answer:
Part 2
20. The transformation scheme is given:
ZnS → X → ZnCl 2 → Zn(OH) 2
21.
22.
the process of its recognition.
Chemistry Examination Grading System
Parts 1 and 2
Correct execution of each task Parts 1 (1–15) is worth 1 point. For completing a task with a choice of answers, 1 point is given, provided that only one number of the correct answer is indicated. If two or more answers are marked, including the correct one, then the answer is not counted.
W an assignment with a short answer is considered to be completed correctly if in the assignments 16-17 correct sequence of numbers. For a complete correct answer to the task, 2 points are given, if one mistake is made, then the answer is estimated at 1 point. If two or more errors are made or there is no answer, then 0 points are given. Exercise 18-19 is considered to be performed correctly if 3 matches are correctly established. Partially correct is the answer, in which 2 matches out of 3 are established, it is estimated at 1 point. The remaining options are considered an incorrect answer and are evaluated at 0 points.
| № tasks | answer | № tasks | answer |
Part 2
Criteria for assessing the performance of tasks with a detailed answer
20. The transformation scheme is given:
ZnS → X → ZnCl 2 → Zn(OH) 2
Write molecular reaction equations that can be used to
carry out these transformations. For the third transformation, make
abbreviated ionic reaction equation.
| Response elements |
|
| The reaction equations corresponding to the transformation scheme are written: 1) 2ZnS + 3O 2 = 2ZnO + 2SO 2 2) ZnO + 2HCl = ZnCl 2 + H 2 O 3) ZnCl 2 + 2KOH \u003d Zn (OH) 2 + 2KCl 4) An abbreviated ionic equation for the third transformation was compiled: Zn +2 + 2OH - \u003d Zn (OH) 2 |
|
| Evaluation criteria | Points |
| 3 reaction equations are written correctly. | |
| Correctly written 2 reaction equations. | |
| Correctly written 1 reaction equation. | |
| Maximum score | |
21. Carbon dioxide was passed through 171 g of a barium hydroxide solution with a mass fraction of 5% until barium carbonate was formed. Calculate the volume (n.s.) of the reacted gas.
| Response elements (Other formulations of the answer are allowed that do not distort its meaning) |
|
| 1) The reaction equation is composed: CO 2 + Ba(OH) 2 = BaCO 3 + H 2 O 2) The mass and amount of the barium hydroxide substance contained in the solution was calculated: m (Ba (OH) 2) \u003d m (p-pa) . w/100 = 171 . 0,05 =8,55 n (Ba (OH) 2) \u003d m (Ba (OH) 2) / M (Ba (OH) 2) \u003d 8.55 / 171 \u003d 0.05 mol 3) The volume of carbon dioxide that reacted was determined: According to the reaction equation n (CO 2) \u003d n (Ba (OH) 2) \u003d 0.05 mol V (CO 2) \u003d n (CO 2) . V m \u003d 0.05. 22.4 = 1.12l |
|
| Evaluation criteria | Points |
| The answer is correct and complete, including all the named elements. | |
| All elements of the answer are written incorrectly. | |
| Maximum score | |
At the lessons of the chemical circle, students examined powdered
black substance. By adding hydrochloric acid to it and
subsequent heating of the resulting mixture, a green solution was formed. A solution of silver nitrate was poured into the resulting solution, as a result, a cheesy precipitate fell out.
Determine the composition of the test substance and write down its name.
Make 2 reaction equations that were carried out by students in
the process of its recognition.
| Response elements (Other formulations of the answer are allowed that do not distort its meaning) |
|
| The composition of the substance is determined and its name is recorded: 1) CuO - copper (II) oxide. 2 equations of reactions carried out by students in the process of studying an unknown substance were compiled: 2) CuO + 2HCl = CuCl 2 + H 2 O 3) CuCl 2 + 2AgNO 3 → Cu(NO 3) 2 + 2AgCl ↓ |
|
| Evaluation criteria | Points |
| The answer is correct and complete, including all the named elements. | |
| The first 2 elements of the above are correctly written. | |
| 1 of the above elements is correctly written (1st or 2nd). | |
| All elements of the answer are written incorrectly. | |
| Maximum score | |
Part 1 contains 19 tasks with a short answer, including 15 tasks of a basic level of complexity (the serial numbers of these tasks: 1, 2, 3, 4, ... 15) and 4 tasks of an increased level of complexity (the serial numbers of these tasks: 16, 17, 18, 19). For all their differences, the tasks of this part are similar in that the answer to each of them is written briefly in the form of one digit or a sequence of digits (two or three). The sequence of numbers is written in the answer sheet without spaces and other additional characters.
Part 2, depending on the CMM model, contains 3 or 4 tasks of a high level of complexity, with a detailed answer. The difference between examination models 1 and 2 is in the content and approaches to the implementation of the last tasks of the examination options:
Exam Model 1 contains task 22, which involves performing a "thought experiment";
Exam model 2 contains tasks 22 and 23, which provide for the performance of laboratory work (a real chemical experiment).
Scale for converting points into grades:
"2"– from 0 to 8
"3"– from 9 to 17
"four"– from 18 to 26
"5"– from 27 to 34
The system for assessing the performance of individual tasks and the examination work as a whole
The correct performance of each of the tasks 1-15 is estimated at 1 point. The correct performance of each of the tasks 16-19 is estimated as a maximum of 2 points. Tasks 16 and 17 are considered completed correctly if two answers are correctly selected in each of them. For an incomplete answer - one of the two answers is correctly named or three answers are named, of which two are correct - 1 point is given. The rest of the answers are considered incorrect and are scored 0 points. Tasks 18 and 19 are considered completed correctly if three matches are correctly established. Partially correct is the answer in which two out of three matches are established; it is worth 1 point. The remaining options are considered incorrect answers and are scored 0 points.
Checking the tasks of part 2 (20–23) is carried out by the subject commission. The maximum score for a correctly completed task: for tasks 20 and 21 - 3 points each; in model 1 for task 22 - 5 points; in model 2 for task 22 - 4 points, for task 23 - 5 points.
To complete the examination work in accordance with model 1, 120 minutes are allotted; according to model 2 – 140 minutes
Getting ready for the GIA in chemistry
| USE-11 - 2019 | |
When the time comes for school exams (USE), everyone is worried: students, teachers, parents. Everyone is interested in the question: how to pass exams more successfully? I must say that success depends on many factors, including students, teachers and parents. The USE is an independent objective state control of learning outcomes. USE - provides equal opportunities for graduates of different regions and different types of schools to enter the universities of the Russian Federation. Unified State Examination - gives all graduates the opportunity to apply to several universities at once or to one for different specialties (according to the latest decisions of the Ministry of Education and Science of the Russian Federation - no more than five universities or no more than five specialties), which undoubtedly increases the chances of applicants for admission. |
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There are no changes in the USE-2019 compared to the USE-2018 |
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- Physical and chemical properties, production and use of alkynes
OGE-9 - 2019
OGE (GIA) in chemistry- an elective exam, and one of the most difficult. Choosing it, thinking that the exam is simple - is not worth it. It is necessary to choose a GIA in chemistry if you plan to take the Unified State Examination in this subject in the future, this will help you test your knowledge and better prepare for the unified exam in two years. Also, a GIA in chemistry is often required for admission to medical colleges.
The structure of the GIA in chemistry is as follows:
1 part: 15 general theoretical questions, with four possible answers, of which only one is correct and 4 questions involving multiple choice of answers or finding a match;
2 part: in it, the student must write down the detailed solution of 3 problems.
Score Compliance GIA (no real experiment) school grades following:
0-8 points - 2;
9-17 points - 3;
18-26 points - 4;
27-34 points - 5.
FIPI recommendations for evaluating the work of the OGE (GIA) in chemistry: 27-34 points deserve only those works in which the student received at least 5 points for solving problems from part 2, this, in turn, requires the completion of at least 2 tasks. One task is worth 4 points, the other two - three points.
The greatest difficulties are caused, of course, by tasks. It is in them that one can easily get confused. Therefore, if you plan to get those same 27-34 points for the OGE (GIA) in chemistry, then you need to solve problems. For example, one task per day.
GIA duration in chemistry is only 120 minutes.
During the exam, the student can use:
- periodic table,
- electrochemical series of voltages of metals,
- table of solubility of chemical compounds in water.
- Use of a non-programmable calculator is permitted.
OGE (GIA) in chemistry enjoys well-deserved fame as one of the most difficult exams. It is necessary to start preparing for it from the very beginning of the school year.
Work instructions
The examination paper consists of two parts, including 22 tasks.
Part 1 contains 19 short answer tasks, part 2 contains 3 (4) long answer tasks.
To complete the examination work, 2 hours (120 minutes) (140 minutes) are allotted.
Answers to tasks 1-15 are written as a single digit, which corresponds to the number of the correct answer. Write this number in the answer field in the text of the work.
Answers to tasks 16–19 are written as a sequence of numbers in the answer field in the text of the work.
If you write down an incorrect answer to the tasks of part 1, cross it out and write down a new one next to it.
For tasks 20–22, a full detailed answer should be given, including the necessary reaction equations and calculations. Assignments are completed on a separate sheet. Task 23 involves the implementation of the experiment under the supervision of an expert examiner. You can start this task no earlier than 1 hour (60 minutes) after the start of the exam.
When performing work, you can use the Periodic Table of Chemical Elements D.I. Mendeleev, a table of the solubility of salts, acids and bases in water, an electrochemical series of metal voltages and a non-programmable calculator.
When completing assignments, you can use a draft. Draft entries do not count towards the assessment of the work.
The points you get for completed tasks are summed up. Try to complete as many tasks as possible and score the most points.
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KIMAOGE plan in chemistry Grade 9 ( MODEL #1) |
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Who are these tests for?
These materials are intended for students preparing for OGE-2018 in chemistry. They can also be used for self-control when studying a school chemistry course. Each is dedicated to a specific topic that a ninth grader will meet on the exam. The test number is the number of the corresponding task in the OGE form.
How are thematic tests arranged?
Will other thematic tests be published on this site?
Undoubtedly! I plan to place tests on 23 topics, 10 tasks each. Stay tuned!
What else is on this site for those preparing for the OGE-2018 in chemistry?
Do you feel like something is missing? Would you like to expand some sections? Need some new content? Something needs to be corrected? Did you find any mistakes?
Good luck to everyone preparing for the OGE and the USE!
