High school entrance exam! ! Please help me! !

2008 Huanggang Middle School Ninth Grade Survey Examination

Mathematics Questions

1. Fill-in-the-blank questions (3 points for each blank, ***33 points)

1. Calculate |-2|=________, 2-3=________, tan45°=________.

2. Decomposition factor:

=________.

3. The value range of the independent variable x of the function is ________. It is known that the inverse proportional function The image passes through point P(a+1,4), then a=________, and the vertex coordinate of parabola y=7(x+2)2 is ________.

4. In △ABC, if AB=3, then cosA=________.

5. As shown in the figure, if a rectangular wooden frame made of four wooden bars is deformed into the shape of a parallelogram ABCD, and its area is half of the area of ??the rectangle, then the maximum interior angle of this parallelogram is The value is equal to _________.

[Answer]

2. Multiple-choice question (one and only one of the four answers A, B, C, and D is correct. Please number the only correct answer in the question. Fill in the brackets after the question. No points will be awarded if you leave it blank, fill it in incorrectly or fill it in too much. The full score for this question is 12 points)

6. Which of the following operations is correct ( )

A. x+x=2x B. (-2x)·x=4x

C. (x－y)2=x2－y2 D． xy÷xy=xy

7. As shown in the figure, AB is the diameter of ⊙O, the chord CD⊥AB, and the vertical foot is M. The following conclusion may not be true ( )

A． CM=DM B.

C. AD=2BD D. ∠BCD=∠BDC

8. As shown in the figure, a small ball falls from point A along a prescribed trajectory. At each intersection, there are two equal chances of going left or right. Then , the probability that the ball finally reaches point H is ( )

9. The vertices A, B, C, and D in the square ABCD are arranged in a clockwise direction. If they are in the plane rectangular coordinate system, points B, The coordinates of D are (2, 0), (0, 0) respectively. Then, the coordinates of points A and C are ( ) respectively.

3. Multiple choice questions (***3 questions, Each question is worth 3 points.

***9 points, at least one answer for each question is correct, 3 points for all correct answers, points for incomplete answers as appropriate, 0 points for wrong or no answers)

10. When -2

A. y=2－x B． y=3x

C. D. y=x2+6x+8

11. As shown in the figure, in △ABC, AD bisects ∠BAC, DE⊥AB, DF⊥AC, then the following conclusion is correct ( )

A. DE=DF B. AD⊥EF

C． EG=FG D. AD=2DE

12. Which of the following propositions is true ( )

A. The range of a set of data - 1, 0, 1, 2, 3 is 4

B. Before "Chang'e-1" went to space, a sampling survey was conducted on the main components

C. Tossing two even one-dollar "coins" at the same time, the probability of "two heads" is

D. It is known that the probability that the current can pass through the electronic components A, B, and C normally within a certain period of time is 0.5, then the probability that the current can pass through the electronic components A, B, and C normally during this period of time is

IV. Answer Question

13. (This question is worth 6 points) Solve the set of inequalities and represent its solution set on the number line.

[Answer]

14. (This question is worth 7 points) Known: As shown in the figure, the perpendicular bisector of the diagonal AC of the parallelogram ABCD intersects with the sides AD and BC respectively. At points E, F. Prove: Quadrilateral AFCE is a rhombus.

[Answer]

15. (The full score for this question is 7 points) There are only three types of student globes sold in a stationery store: A, B, and C. The following tables and statistical charts are given respectively. The profits and sales of each of these three types of globes last month are shown.

Profit statistics table for each of the three globes A, B, and C

Globe model

A

B

C

Profit per unit (yuan)

3

2.5

6

A, B , C sales statistics chart of three types of globes

(1) In order to promote these three types of globes, the store owner set up a prize sales method, using a dice to roll the points (only once), and the If you throw 5 points, you will be rewarded with an eraser, and if you throw 6 points, you will be rewarded with a "soft-sided copy" book. Xiaodong buys a globe and rolls a dice. The probability of winning is ________.

(2) If the store plans to purchase 600 globes of these three types next month, combined with the sales last month, how many globes of each of the three types A, B, and C do you think? The total profit is the highest? What is the total profit obtained at this time?

[Answer]

16. (Full score for this question is 7 points) Xiao Li has inconvenient legs and feet, but he is physically disabled and has a strong will. He opened a small newsstand, taking the sale of "Dahe Evening News" as an example: the retail price of the newspaper was 6 cents, and the wholesale price was 4 cents. Generally, 100 copies were sold every day. Xiao Li boldly innovated and used the following methods to promote sales: buy "Dahe Evening News" at this stall. "Dahe Evening News", if you are not satisfied after reading it, you can return it intact before 12 noon, and you will get a refund of 0.2 yuan. As soon as this advertisement came out, the number of customers increased sharply. By 10 a.m., 200 copies of "Dahe Evening News" were auctioned, but before 12 o'clock, *** returned 160 copies. In the afternoon, he sold out the 160 newspapers returned in the morning at a price of 0.3 yuan per copy.

(1) How much is the total income from selling "Dahe Evening News" every day after Xiao Li changed the sales method?

(2) The average amount of each copy of "Dahe Evening News" after Xiao Li changed the sales method 》How many yuan did it sell for?

[Answer]

17. (This question is worth 8 points) As shown in the figure, it is known that AB and AC are the diameter chords of ⊙O, and D is the diameter of ⊙O. The midpoint, DE⊥AC is at E. Prove: DE is a tangent to ⊙O.

[Answer]

18. (The full score for this question is 7 points) As shown in the picture, farmer Zhang Uncle turned the pond △ABC into a fishing pond, and built a fishing platform at points A, B, and C. It is known that AB=26 meters, AC=18 meters, and the height AD beside BC=10 meters. Due to the large number of customers, Uncle Zhang plans to change the fish pond into a circular shape and keep the original three fishing platforms A, B, and C unchanged. Could you please help calculate the radius of the fish pond after it is changed into a circular fish pond?

[Answer]

19. (This question is worth 10 points) A multinational company specializes in the production of fitness products. The first batch of product A was sold out within 40 days of going on sale. The company conducted a survey on the domestic and foreign market sales of the first batch of product A after it was launched. The results are shown in Figures (1) and (2).

(1) Write the functional relationship between the daily sales volume y (10,000 pieces) in the domestic and foreign markets and the launch time t of the first batch of product A;

(2) If the sales profit of each product A is 60 yuan, write down the functional relationship between the daily sales profit W (10,000 yuan) of the first batch of product A after its launch and the launch time t;

(3) Question 1 On which day is the maximum sales profit?

[Answer]

20. (This question is worth 14 points) It is known that, as shown in the figure, the quadrilateral AOBC is a square, and the coordinates of point C are moving points. P and Q start from point O at the same time, P moves along the direction of the polyline OACB, and Q moves along the direction of the polyline OBCA.

(1) The coordinates of point A are ( ) and the coordinates of point B are ( )

(2) If P and Q move at a speed of 1 unit per second, when P When the movement stops at point A, Q also stops. Let the area of ??△OPQ be S and the movement time be t seconds. Find the functional relationship between S and t.

(3) If the movement speed of P is 1 unit per second, the movement speed of Q is 2 units per second, and the movement stops when they meet, let the area of ??△OPQ be S, and the movement Time is t seconds, find the functional relationship between S and t.

(4) If the moving speed of Q is twice the moving speed of P, the quadrilateral with A, P, B and Q as vertices is a parallelogram. Find the analytical formula of the straight line PQ.

Huanggang Middle School 2007 Junior High School Adaptability Test

Physics Test Questions

1. Multiple Choice Questions

1. Li Yiyi, a poet of the Tang Dynasty The poem is called "Happy to see my younger brother and say goodbye", which describes: "After ten years of separation, we met each other when we were older. We were surprised when we asked each other for our first names. We called each other by name and recalled our old appearance.

From the "asking for a surname", we think of the "old appearance" we saw at first. It can be seen that there is a feature in the voice that reminds the poet of memories from ten years ago. This feature is ( )

A. Tone b. Loudness

C. timbre D． Amplitude

2. The following are some data and corresponding measurement tools collected by Gao Gao during his study. The correct one is ( )

A. The height of junior high school students is generally around 1.6m - student triangle

B. The weight of junior high school students is generally around 50Kg - platform scale

C. The working current of the small light bulb is about 0.3A - electric energy meter

D. The grip strength of junior high school students is generally about 450N - grip dynamometer

3. As shown in the figure, there are two small balls A and B of equal volume in the water tank. Ball A is floating in the water, and ball B is suspended in the water. The buoyancy forces they receive are F A and F B respectively; their densities are ρ A and ρ B respectively. Which of the following statements about the buoyant force on A and B and their densities is correct ( )

A. F A > F B, ρ A > ρ B B. F A

C. F A > F B, ρ A < ρ B D. F A < F B, ρ A > ρ B

4. The waves emitted by the following equipment when working are not electromagnetic waves ( )

A. Ultrasound waves emitted during B-ultrasound examination of the body

B. Microwaves emitted when a microwave oven heats food

C. Radio waves emitted by television transmission towers

D. Light waves propagating in Internet optical cables

5. Use a magnifying glass to observe the color TV screen. You will see that the three-color luminous areas are arranged in an orderly manner ( )

A. Red, green, blue B. Red, yellow, blue

C. Red, yellow, purple D. Yellow, green, purple

6. Among the following statements, which one is correct ( )

A. The effect of force is to change the motion state of the object or change the shape of the object?

B. A moving object has no inertia. It only has inertia when it changes from motion to rest?

C. The object is only acted upon by two forces. If the three elements of the two forces are the same, the motion state of the object will not change

D. When a car moves in a straight line at a constant speed on a level road, a person standing on the car must be acted upon by a pair of balancing forces in the horizontal direction

7. The temperature of the object does not change. Which of the following statements is correct ( )

A. The internal energy of the object must not have changed?

B. Can the internal energy of an object change?

C. The object must not have absorbed heat, nor must it have given off heat?

D. The object must not be doing any work to the outside world, and the outside world must not be doing any work to the object.

8. Among the four energized solenoids shown in the figure, which one can correctly represent the magnetic pole polarity of the energized solenoid ( )

9. Xiao Zhu and his classmates in the third grade of junior high school (1) used Sunday to do good deeds for the lonely elderly. Xiao Zhu helped the elderly buy a 20kg bag of rice. He first put the rice from the vegetable market 500m away. Carrying the meter downstairs on a level surface, and then carrying the rice to the 10m-high fourth floor. If Xiao Zhu's weight is 600N, then the correct one of the following statements is ( )

A. When Xiao Zhu goes upstairs at a constant speed, the support force of the stairs for him is 600N

B. When walking along a level road, the work done by Xiao Zhu on the rice is 105J

C. When going upstairs, the work done by Xiao Zhu on the rice is extra work

D. During the process of going upstairs, Xiao Zhu’s mechanical efficiency was 25

10. As shown in the figure, it is a stroke diagram of a four-stroke internal combustion engine. From the movement of the intake valve, exhaust valve and piston It can be concluded that the energy conversion of this stroke is ( )

A. Mechanical energy is converted into internal energy B. Internal energy is converted into mechanical energy

C. Transfer of internal energy D. Transfer of mechanical energy

[Answer]

2. Fill in the blanks

11. The picture shows a bottle opener. When in use, screw the auger bit into the cork, then press the handle with both hands to pull out the cork. The drill bit is made tapered to __________ (fill in "increase" or "decrease") the pressure. In the process of pulling out the cork, the pressure handle is equivalent to __________. If the bottle stopper is 0.05m long and the average resistance to the bottle stopper is 200N, then the work done by Wang Zhe to overcome the resistance of the bottle stopper is __________J. If the time taken is 5 seconds, then the power of work is __________W.

12. As shown in the picture, put the mouth of the test tube downwards so that the mouth of the test tube just touches the water surface and water ______ enters the tube (fill in: "can" or "cannot"); if the mouth of the test tube faces downwards, Place it above the flame of the alcohol lamp and heat it for 3-5 seconds until the mouth of the tube just touches the water surface and does not move. The possible phenomenon is: ______________; your judgment is based on: ____________________________.

13. Song Xiang, a talented scholar in the late Qing Dynasty, responded to couplets casually. Below is a pair of couplets he answered correctly. The first couplet is: "Two mirrors hang on the stand, one woman is dressing up and three are facing each other." The second couplet is "A solitary lamp hangs on the wall, two people make bows and bows." Please tell me about the physical principles contained in this couplet. The first line ______________ and the second line ______________.

14. The structure of a water flow exhauster commonly used in chemical laboratories is as shown in the figure. When in use, let tap water flow into the T-shaped glass tube with a built-in spout. Due to the action of water flow, the speed of the airflow at nozzle A will ________ (optional "decrease" "increase" or "unchanged"), and the pressure of the gas at A will ________ (optional "decrease" "increase" ” or “unchanged”), thereby causing a pressure difference between the gas at the nozzle A and the gas in the pumping container to achieve the purpose of pumping.

[Answer]

3. Drawing and experiment

15. Xiao Ming accidentally kicked the toy ball with a rope into the tree and hung it. On the branch, the east wind was blowing at that time. Draw a schematic diagram of the force on the ball.

16. As shown in the figure, there are two rays emitted by a point light source. Try to draw the refracted rays after they pass through the glass.

17. The total mass of the beaker originally containing a certain liquid is 103.6 g. After pouring part of the liquid into the measuring cylinder and balancing it on the adjusted balance, the mass and balance of the weight will The position is shown in Figure 13 (A), then the total mass of the beaker containing this liquid is ______________g; the liquid poured into the measuring cylinder is shown in Figure 13 (B), the volume of these liquids is ______________cm3 ; According to the above experimental results, it can be seen that the density of the liquid is ______________kg/m3.

18. (15 points) As shown in the figure, it is a physical component diagram for measuring the electric power of a small light bulb. The power supply is composed of three batteries. The rated voltage of the small light bulb is 3.8V, and its filament resistance is approximately 10Ω, the sliding rheostat is marked with "10Ω, 1A", ammeter (0~0.6A, 0~3A), voltmeter (0~3V, 0~15V).

(1) The principle of this experiment is: _______________;

(2) Please use strokes instead of wires to connect the circuit components in the picture on the right to form an experimental circuit. (Requirement: The light turns on when the slider P moves to the left, and the connections must not cross)

(3) Xiaogang connects the circuit reasonably and operates in the correct sequence. After closing the switch, the light does not turn on. Liang, smart Xiaogang guessed:

A. Maybe the filament is broken B. It may be that the varistor is open circuit

C. It may be that the small light bulb is short-circuited D. It may be that the ammeter is open circuit

Please verify Xiaogang's conjecture with the ammeter and voltmeter in the connected circuit, and fill in the corresponding readings of the ammeter and voltmeter in the table below.

Guess

Current represents the number/A

p> Voltage expressed number/V

If A holds true

If B holds true

(4) After troubleshooting, when measuring the rated power of the small light bulb, You should first adjust _______________ so that the voltage across the small bulb is ___________V, and then measure the _______________ in the circuit to calculate the rated power; if the actual voltage across the small bulb is 1.2 times the rated voltage, the actual power is ___________ times of rated power. (Assuming the resistance value remains unchanged)

(5) During the experiment, if it is found that the pointer of the ammeter swings, the two situations shown in Figures A and B below will occur. Please analyze what problems exist when using the ammeter and write them on the horizontal line below.

Problems with phenomenon A:_________________________________________;

Problems with phenomenon B:_________________________________________.

[Answer]

IV. Exploration and experience

19. Pay attention to the life around you, physics is everywhere.

(1) A strong wind blew down Xiaohong’s books, pens, test papers, manuscript paper, erasers and other stationery placed on the windowsill. Xiaohong observed that these things fell at different speeds. When they landed, The speed is also different. So she wondered what factors related to the speed of an object falling to the ground? So she made many conjectures: the speed of the falling object may be related to the material of the object, __________ (write down her two possible conjectures), etc. And designed experiments to verify the correctness of his conjecture. It is assumed that the experiment can be carried out without considering air resistance. Verify that the speed of an object falling is related to the material of the object.

① Required experimental equipment: Choose two ________ objects and clocks made of the same different materials.

②Main experimental steps: Let two objects fall freely from ________, and record the time t1 and t2 it takes for the two objects to fall. The comparison can be used to judge and draw conclusions.

In this experiment, the experimental methods used are ________ method and ________ method. Convert the speed of the falling object into time, a directly measurable quantity. If the measured time is ________, then the speed and material of the falling object are ________.

(2) Electrical appliances such as rice cookers, hair dryers, electric fans, electric motors, electric kettles, and electric irons have one thing in common, they ______________. In today's information age, a lot of information has brought convenience to our lives and studies, but there is also some false information. We should learn to distinguish between true and false. The following is an excerpt from an advertisement about electric kettles: "... This electric water heater is efficient, energy-saving and time-saving. Its specifications are 220V, 300W. On a household circuit, it can boil water in an ordinary thermos bottle. It only takes 4 minutes... …”Do you think this ad is believable? __________ (fill in “credible” or “uncredible”) Please use the knowledge you have learned to explain your judgment____________________________.

[Answer]

5. Innovation and Application

20. The average wind speed in a certain area is 6m/s, and the density of air is known to be 1.2kg/ m3． There is a windmill here. When its blades rotate, they can form a circular surface with an area of ??about 1200m2. Find:

(1) On average, how much mass of airflow hits the circular surface formed by the windmill blades in 1 second?

(2) It is known that the kinetic energy of lkg air moving at such a speed is 20J. If this windmill can convert 10% of the kinetic energy E of the air flowing through this circular surface into electrical energy. What is the average electrical energy E generated by the windmill per second?

[Answer]

21. Starting from March 1 this year, my country will impose restrictions on household refrigerators and air conditioners. Two products were implemented first

Under the energy efficiency labeling system, all air conditioners and refrigerators produced, sold and imported in the future should have the "China Energy Efficiency Label" label affixed in a prominent position (as shown in Figure 20). The energy efficiency label divides energy efficiency into five levels: 1, 2, 3, 4, and 5. Level 1 represents the most energy-saving product, and level 5 is the market access indicator. Products below this level are not allowed to be produced and sold.

(1) According to scientific predictions by relevant departments, in the next 10 years after the implementation of energy efficiency labeling, household air conditioners and refrigerators can save a total of 54.8 billion kilowatt hours (approximately 1.972×1017J). How many tons of standard coal is this electrical energy equivalent to the heat released by the complete combustion? (It is known that the calorific value of standard coal is 2.9×107J/kg)

(2) At present, a high-efficiency and energy-saving electric power generator with an electric power of 1000W Refrigeration air conditioner A is priced at approximately 3,000 yuan. Another general energy-saving refrigeration air conditioner B with the same cooling effect has an electric power of 1500W and is priced at approximately 2,000 yuan. If the service life of the air conditioner is 12 years and the average household use is 500 hours per year, the price of 1 kilowatt hour of electricity is calculated as 0.50 yuan. Try to find out the electricity cost savings of a high-efficiency energy-saving air conditioner compared with a general energy-saving air conditioner after 12 years of use.

(3) Based on the information you know, make suggestions to consumers who are about to purchase air conditioners and briefly explain the reasons.

[Answer]

Huanggang Middle School 2007 Adaptability Test

Chemistry Test Questions

1. Multiple choice questions (1 to 10 questions each There is only one correct answer for each question, 1 point for each question, one or two correct answers for questions 11 to 13, 2 points for each question, ***16 points)

1. Life and Chemistry is closely related. In the following description, only physical changes occur ( )

A. Use dilute hydrochloric acid to remove scale on the inner wall of the thermos bottle

B. The food eaten is digested after a period of time

C. After being exposed to the rain, the bicycle became rusty

D. Water freezes after being put into the refrigerator for a while

2. Which of the following substances are arranged in the order of elements, oxides, and mixtures ( )

A. Ice, dry ice, acetic acid

B. Nitrogen, oxygen, air

C. Mercury, water, medical disinfectant alcohol

D. Graphite, slaked lime, hydrochloric acid

3. Which of the following experimental operations is correct ( )

4. The following is part of an exercise done by Xiaogang after he learned chemical terms. The correct one is ( )

A. 2O: represents 2 oxygen atoms

B. : Indicates that the magnesium element in magnesium oxide is +2 valent

C. 2Fe3+: represents 2 ferrous ions

D. Vitamin C (C6H8O6): means that the substance is composed of three elements, and the molecule contains 20 atoms

5. Which of the following statements about chemical fertilizers is correct ( )

A. Ammonium nitrate is a compound fertilizer

B. The application of chemical fertilizers will not cause environmental pollution

C. Ammonium nitrate has a higher nitrogen content than urea

D. When storing ammonium bicarbonate, you should pay attention to sun protection and moisture-proof

6. Environment and energy are the basic conditions for human survival and development.

Which of the following statements about the environment and energy is incorrect ( )

A. Coal, oil, and natural gas are three important fossil fuels

B. Extensive exploitation of groundwater resources can alleviate the water crisis for mankind, and mankind no longer has to worry about the lack of fresh water

C. Solar energy, water energy, and wind energy are important energy sources that humans are using and developing

D. Carbon dioxide is the main substance causing the greenhouse effect

7. Under certain conditions, add 20g each of four substances A, B, C, and D into a closed container. After full reaction, measure their mass and obtain the data. As follows:

Substance

A

B

C

D

Reaction Pre-reaction mass (g)

20

20

20

20

After reaction mass (g)

20

30

Unknown

14

Which of the following is correct ( )

①A decomposition reaction occurred in the container

②A compound reaction occurred in the container

③The mass of C in the container after the reaction was 16g

④Container The reaction occurring within can be expressed as B→C+D

A. ①③ B. ②③

C. ③④ D. ①④

8. In order to study the metal activity of manganese, copper, and nickel (Ni), the following experiment was carried out: the nickel wire was inserted into the manganese sulfate solution and the copper sulfate solution respectively. There was no change in the surface of the former nickel wire. , the latter has a red solid precipitated on the surface of the nickel wire. From this, it can be obtained that the order of activity of the three metals manganese, copper, and nickel from strong to weak is ( )

A. Mn, Ni, Cu B． Cu, Mn, Ni

C. Ni, Cu, Mn D. Ni, Mn, Cu

9. Chemistry is everywhere. Use the knowledge you have learned to decide which of the following statements is incorrect ( )

A. Use vinegar to remove scale from thermos bottles

B. Alcohol is non-toxic and can promote blood circulation. Drinking large amounts is beneficial to the human body

C. Natural gas pipeline leaks, there is a risk of explosion at any time

D. Polyvinyl chloride film is not suitable for packaging food

10. Which chemical equation written according to the following requirements is correct ( )

A. Iron burns in oxygen: 4Fe+3O22Fe2O3

B. Neutralization reaction occurs between clarified lime water and hydrochloric acid: CaO+2HCl=CaCl2+H2O

C. Treat excessive gastric acid with sodium bicarbonate: NaHCO3+HCl=NaCl+H2O+CO2↑

D. Check whether the mixed gas contains carbon dioxide: CO2+2NaOH=Na2CO3+H2O

11. The picture is the solubility curve of two substances, M and N. At t2℃, a g M and a g are added to a beaker containing 100g of water. N (the two substances do not affect each other when dissolved, and the solutes are still M and N), stir thoroughly.

Reduce the temperature of the mixture to t1℃. Which of the following statements is correct ( )

A. At t2℃, a saturated solution of M is obtained

B. At t2℃, a saturated solution of N is obtained

C. When the temperature drops to t1℃, the solute mass fractions of M and N are equal, and an unsaturated solution of M and N is obtained

D. When the temperature drops to t1°C, the solubilities of M and N are equal, resulting in a saturated solution of M and N

12. If a solution can react with magnesium to generate hydrogen, then each of the following groups of substances can be present in large amounts in the solution What exists is ( )

A. KCl, NaOH, Na2SO4 B． NaCl, NaNO3, AgNO3

C. Na2CO3, NaCl, Na2SO4 D. HCl, NaCl, Na2SO4

13. The 2005 Nobel Prize in Chemistry was awarded to three scientists from the United States and France for their research results in the synthesis of organic matter "a big step forward in the direction of green chemistry" (Judge Conversation), which of the following statements about green chemistry is correct ( )

A. Green chemistry means that the products produced are all green plants

B. Green chemistry is the use of chemical principles to eliminate pollution from the source

C. Green chemistry research studies the development and application of memory alloys

D. Green chemistry is the chemistry of synthesizing new elements

[Tips]

2. Fill-in-the-blank short answer questions (this question includes 4 questions, ***21 points)

14. (5 points) According to the following requirements, write the chemical equation of the reaction.

(1) Replacement reaction involving carbon: ____________________________

(2) Decomposition reaction involving water: ____________________________

(3) Metathesis reaction: ____________________________

(4) Potassium permanganate is used to produce oxygen in the laboratory: ____________________________

(5) Methane burns in the air: ____________________________

15. (4 points ) Fill in the blanks as required.

(1) Fill in the blanks with appropriate numbers and symbols:

① Two neon atoms ____________; ② Urea ____________; ③ Three hydrogen chloride molecules ____________.

(2) Write the chemical formula of the substance that meets the following requirements:

①The gas with the smallest density____________ ②Substances that can be used as gas fertilizer in agriculture____________

③Alkali commonly used as sanhe soil____________ ④Acid used in refining petroleum____________

⑤Salt that can be used as nitrogen fertilizer____________

16. (5 points) A It is the main component of the red solid on the surface of a waste lathe in a factory. B, C, and F are all simple substances. D and F have no color or smell. A to F are common substances in junior high school chemistry. The mutual transformation relationship between them is as follows:

Please answer:

(1) Write the chemical formulas of the following substances: A____________; F____________; G____________.

(2) Write the following chemical equation:

①Chemical equation of the reaction between gas D and excess clarified lime water____________________;

②Chemistry of the reaction of A+B equation________________________.

17. (7 points) Energy is an important guarantee for social development, and chemistry and energy have a very important relationship. Please complete the following summary of energy-related issues:

(1) We call energy obtained directly from nature as primary energy, and energy obtained through processing of primary energy is called secondary energy. The following are some of the energy sources currently being utilized and developed: 1. Coal; 2. Hydrogen energy; 3. Natural gas; 4. Solar energy; 5. Wind energy. Among them, the ones that are not primary energy sources are (fill in the serial number) ____________________, and the renewable energy sources are ____________________.

(2) my country is the world’s largest coal-producing country. However, SO2 emitted from the combustion of sulfur-containing coal can cause "acid rain" and have ____________ effects on the natural world, affecting plant growth and other effects. In order to reduce air pollution, a certain power plant adopts the "lime sulfur fixation method", that is, quicklime CaO is mixed into coal to absorb SO2 and cause a chemical reaction. Write the chemical equation of the "sulfur fixation method" reaction ____________________________.

(3) Scientists predict that hydrogen energy will become the main green energy source in the 21st century, based on ______________ (write one).

(4) At present, many cities in my country have used ethanol gasoline. Our city is a famous commercial grain base, but a large amount of expired grain - aged grain appears every year. People use aged grain to produce alcohol. The process is:

Write out how to produce alcohol from glucose The chemical equation of ____________________.

[Answer]

3. Experimental inquiry questions (8 points)

18. The picture below shows the experimental inquiry conducted by Xiaoli and other students. . Please analyze according to the picture: (1) The name of the experimental research that the research team wants to complete is: ____________________

(2) The reagent Xiaoli dropped into the beaker shown in Figure 1 may be __________.

(3) During the experiment, because dilute hydrochloric acid was accidentally dropped onto the glass rod, it should be _______________.

(4) During the experiment, Xiaoli saw that the solution in Figure 2 was a colorless solution. Everyone continued to explore the colorless solution obtained by Xiaoying. Xiao Bin thinks that the solute in the solution after the reaction is sodium chloride, and Xiao Liang thinks that there are two solutes, and they are _______________. After the students conducted experiments according to the following two plans, they unanimously believed that Xiaoliang's point of view was correct. Please fill in the gaps in the table below.

Experimental Operation

Experimental Phenomenon

Experimental Conclusion

Option 1: Take a small amount of the reacted solution and place it in a test tube. Add litmus test solution

The solution appears red

Xiao Liang’s point of view is correct

Option 2: Take a small amount of the reacted solution and place it in a test tube. Join________

(5) After the experiment, the whole group of students reviewed the information together and analyzed the following questions. The microscopic process of the reaction between dilute sulfuric acid and sodium hydroxide solution is shown in the figure. A specific analysis of the reason why this reaction can occur from the perspective of particles is ____________________.

(6) Through analysis, the chemical equation of the reaction occurring in this process is _______________.

[Answer]

IV. Calculation questions (5 points)

19. A certain factory laboratory uses a 15% sodium hydroxide solution to wash a certain amount of petroleum products. The residual sulfuric acid in the solution consumes 40g of sodium hydroxide solution, and the washed solution is neutral. How many grams of H2SO4 does this quantity of petroleum product contain?

[Answer]

Some questions don’t have pictures~~You can take a look at it~~The high school entrance examination~~It is recommended to review the content in the book~~