Online GIA tests in chemistry. OGE test work in chemistry

The OGE in chemistry is taken only at the student’s choice; this test is not included in the list of mandatory ones. Chemistry is chosen by students who, after the 9th grade, plan to enter a specialized 10th grade school or a specialized college or technical school. To enter medical school, you need to take not only chemistry, but also biology. The exam implies orientation in theory and successful application of it in practice. The test taker needs to solve many tasks of different difficulty levels from a wide range of topics. To decide which topics to pay attention to, read the OGE preparation program in chemistry.

The exam consists of tasks, which are divided into two logical blocks:

• The first part includes tasks on knowledge of theory: here you need to give a short answer - a number, a sequence of numbers, a word.
• In the second part there are several questions to which you need to give detailed, complete answers, conduct a laboratory experiment, write conclusions, and perform calculations. It is extremely important to be able to use special equipment and use algorithms for solving problems of varying levels of complexity.
  

• The main advice that is relevant for every exam is to plan your study. Without a clear plan, you will not be able to achieve a high level of training. To make your planning as efficient as possible, check out– it indicates topics and sections to which you need to pay special attention.
• Assess your strengths: the easiest way is online testing. After passing the test, you receive the result and can evaluate which types of tasks and topics cause you the most difficulty.
• Once you have identified problematic topics, give them more attention than others. For training, take textbooks and reference books.
• Be sure to solve problems! The more problems you solve to prepare, the easier it will be in the exam.
• Ask questions: find a specialist who can help you in problematic situations. This could be a tutor or school teacher. Only a specialist can help you analyze your mistakes and not make them again.
• Learn to use hints - those tables that you can take with you to the exam.
• Studying theory is not enough; it is very important to practice performing tests. This form of knowledge testing causes difficulties for many, especially if it was not used in lessons. Solve more test questions of different types so that they do not cause fear and misunderstanding during the exam.
  
• “Solving the OGE in Chemistry” will help you prepare for the exam and pass it successfully, using the allotted time rationally and without stress.

Who are these tests for?

These materials are intended for schoolchildren preparing for OGE-2018 in chemistry. They can also be used for self-control when studying a school chemistry course. Each one 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 subject tests structured?

Will there be other subject tests published on this site?

Undoubtedly! I plan to post 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 any sections? Need some new materials? Anything that needs to be fixed? Found any errors?

Good luck to everyone preparing for the Unified State Exam and the Unified State Exam!

Option

control measuring materials for

holding in 2017 the main state

CHEMISTRY exam

Instructions for performing the work

The examination paper consists of two parts, including 22 tasks. Part 1 contains 19 short-answer tasks, part 2 contains 3 long-answer tasks.

You are given 2 hours (120 minutes) to complete the exam paper in chemistry.

Answers to tasks 1–15 are written as one number, which corresponds to the number of the correct answer. Write this figure in the answer field in the text of the work, and then transfer it to answer form No. 1.

Answers to tasks 16–19 are written as a sequence of numbers. Write this sequence of numbers in the answer field in the text of the work, and then transfer it to answer form No. 1.

For tasks 20–22, you should give a complete, detailed answer, including the necessary reaction equations and calculations. The tasks are completed on answer form No. 2.

When performing work, you can use the Periodic Table of Chemical Elements D.I. Mendeleev, a table of 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. Entries in the draft are not taken into account when grading work.

The points you receive for completed tasks are summed up.

Try to complete as many tasks as possible and score the most points.

We wish you success!

Part 1

The answer to tasks 1–15 is one number, which corresponds to the number of the correct answer. Write this number in the answer field in the text of the work, and then transfer it to ANSWER FORM No. 1 to the right of the number of the corresponding task, starting from the first cell.

A chemical element of the 3rd period of the VA group corresponds to a diagram of the distribution of electrons across layers:

An ionic bond is characteristic of each of two substances:

1) potassium chloride and hydrogen chloride

2) barium chloride and sodium oxide

3) sodium chloride and carbon monoxide (IV)

4) lithium oxide and chlorine

Each of the two substances is complex

1) water and chlorine

2) water and hydrogen

3) hydrogen and quartz

4) benzene and water

The largest number of positive ions is formed during the dissociation of 1 mol

1) sulfuric acid

2) sodium phosphate

3) iron(III) nitrate

4) potassium sulfide

Both substances of the pair react with water at room temperature

1) oxygen and carbon

2) magnesium and sulfur

3) aluminum and phosphorus

4) sodium and calcium

Among the substances: Zn, Al 2 O 3, Cu(OH) 2, BaCl 2 - reacts with a solution of sulfuric acid

4) four

Are the judgments about the methods of separating mixtures correct?

A. Evaporation is a physical method for separating mixtures.

B. Separation of a mixture of water and ethanol is possible by filtration.

1) only A is correct

2) only B is correct

3) both judgments are correct

4) both judgments are incorrect

The answer to tasks 16–19 is a sequence of numbers that should be written in ANSWER FORM No. 1 to the right of the number of the corresponding task, starting from the first cell. Write your answer without spaces, commas or other additional characters.

Write each number in a separate box in accordance with the samples given in the form.

When completing tasks 16, 17, from the proposed list of answers, select two correct ones and write down the numbers under which they are indicated in the table.

16. What magnesium and silicon have in common is

1) the presence of three electronic layers in their atoms

2) the existence of simple substances corresponding to them in the form of diatomic molecules

3) the fact that they belong to metals

4) the fact that their electronegativity value is less than that of phosphorus

5) their formation of higher oxides with the general formula EO 2

When completing tasks 18, 19, for each element of the first column, select the corresponding element from the second column. Write down the selected numbers in the table under the corresponding letters. The numbers in the answer may be repeated.

Do not forget to transfer all answers to answer form No. 1 in accordance with the instructions for completing the work.

Part 2

For answers to tasks 20–22, use ANSWER FORM No. 2.

First write down the number of the task (20, 21 or 22), and then the detailed answer to it. Write down your answers clearly and legibly.

20. Using the electron balance method, create an equation for the reaction

KMnO 4 + KOH → K 2 MnO 4 + O 2 + H 2 O

Identify the oxidizing agent and the reducing agent.

21. An excess of potassium hydroxide solution was added to 376 g of a solution with a mass fraction of copper (II) nitrate of 7.5%. Determine the mass of the deposited sediment.

22. Given substances: Zn, HCl (solution), H 3 PO 4, AgNO 3, NH 4 Cl, Ba(NO 3) 2. Using water and the necessary substances only from this list, obtain zinc nitrate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic equation for the reaction.

Features of CMM - 2014

In 2014, 2 models of examination work in chemistry are offered to the choice of educational authorities of the constituent entities of the Russian Federation.

- Demovesia-1: the structure is similar to the work of 2013. However, significant changes have been made to the content of part C:
- Task C1 provides for the arrangement of coefficients in the OVR using the electronic balance method (similar to C1 of the Unified State Exam, using simpler reactions). Evaluated at three primary points.
- Task C2 - calculation problem (similar to C2 of previous years). Evaluated at three primary points.
- Task C3 - thought experiment: for a given set of substances, plan a two-stage synthesis of a new substance, write the reaction equations, indicate the signs of their occurrence. Write the ionic equation for one of the reactions. Scores five primary points.
The maximum primary score for completing part C increased to 11 points, for completing the entire work - to 34 points.

- Demovesia-2: the practice-oriented component has been strengthened, and therefore the examination paper includes a task for performing a real chemical experiment (C4). Task C4 is a continuation of task C3, which in this case is estimated at 4 points, the maximum score for task C4 is 5 points, the total score for part C is 15 points.

The chemical experiment is carried out in a special room - a chemical laboratory (a list of equipment and reagents is given in the specification).

To observe the conduct of a chemical experiment, chemists who are also experts in assessing its implementation must be invited.

An additional 20 minutes are allocated for the chemical experiment. To organize an exam according to the second model, the following can be used:
Methodological materials for organizing and conducting a student chemical experiment as part of the state (final) certification (GIA) 2014 of graduates of IX grades in chemistry. /Kaverina A.A., Dobrotin D.Yu., Molchanova G.N. – Federal State Budgetary Institution “Federal Institute of Pedagogical Measurements”, - M, 2013. (

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). Despite all their differences, the tasks in this part are similar in that the answer to each of them is written briefly in the form of one number or a sequence of numbers (two or three). The sequence of numbers is written on the answer form without spaces or 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 exam models 1 and 2 lies in the content and approaches to completing the last tasks of the exam options:

Examination model 1 contains task 22, which involves performing a “thought experiment”;

Examination model 2 contains tasks 22 and 23, which involve performing laboratory work (a real chemical experiment).

Scale for converting points to grades:

"2"– from 0 to 8

"3"– from 9 to 17

"4"– from 18 to 26

"5"– from 27 to 34

System for assessing the performance of individual tasks and the examination work as a whole

Correct completion of each of tasks 1–15 is scored 1 point. Correct completion of each of tasks 16–19 is assessed with a maximum of 2 points. Tasks 16 and 17 are considered completed correctly if two answer options are correctly selected in each of them. For an incomplete answer - one of two answers is correctly named or three answers are named, two of which are correct - 1 point is given. The remaining answer options are considered incorrect and are scored 0 points. Tasks 18 and 19 are considered completed correctly if three correspondences are correctly established. An answer in which two out of three matches are established is considered partially correct; it is worth 1 point. The remaining options are considered an incorrect answer and are scored 0 points.

The tasks of Part 2 (20–23) are checked by a subject commission. 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