A. Water freezes into ice B. Wet clothes dry C. Choppers rust D. Boiling water boils
Answer C
2. (2009?Nantong) The following substances are used for purposes that make use primarily of their physical properties ( )
A. Compressed natural gas is used as fuel B. Copper metal is used to make guide wires C. Nitrogen is used for food preservation D. Lime neutralizes acidic soil
Answer B
3. (2009? Ya'an, Sichuan Province) The following properties of a substance are chemical in nature ( ）
A.Color,State B.Melting point,Boiling point C.Reductive,Flammability D.Density,Hardness
Answer C
4. (2009? Ya'an, Sichuan) Of the following exothermic phenomena in daily life, the one that is fundamentally different from the other three is ( )
A. Natural gas burns exothermically B. Electric bulbs electrify and heat up
C. Quicklime mixes with water and exotherms D. Magnesium reacts with hydrochloric acid and exothermically
Answer B
5. (2009?四川雅安) 2009?Sichuan Meishan) The following changes must have taken place chemically ( )
A.Ice melting B.Food rotting C.Golden laurel perfuming D.Dust flying
Answer B
6. (2009 Sichuan Leshan) The following phenomena belong to the physical changes ( )
A.Wet clothes drying out B.Steel rusting C.Paper burning D .food mold
Answer A
7. (2009?Sichuan Mianyang) The following phenomena in life, in which a chemical change has occurred is ( )
A.glass breaks B.alcohol volatilizes C.food becomes rancid D.paraffin wax melts
Answer C
8. (2009?Sichuan Chengdu) Judgement "To determine whether a chemical change has occurred in the therapeutic mechanism of Tamiflu is based on ( )
A. Whether the size of the virus has changed B. Whether the shape of the virus has changed
C. Whether the virus has left the host cell D. Whether there is new material produced
Answer D
9. ((2009?Lanzhou, Gansu)
Answer D
9. ((2009?Lanzhou, Gansu)
Answer D
9. 2009?Gansu Lanzhou) The following home experiments do not involve chemical changes ( )
A. Removing scale from a kettle with a small amount of vinegar B. Making sweet wine brew with glutinous rice, liquor quartz and water
C. Sterilizing and disinfecting with 75% alcohol D. Removing bad smells from a refrigerator with charcoal
Answer D
10. (2009? Guangdong Maoming) The following changes are chemical changes ( ) A. Sublimation of dry ice B. Electrolysis of water to make hydrogen and oxygen
C. Volatilization of gasoline D. Production of fresh water from seawater by passing it through a polymer membrane
Answer B
11. (2009? Guigang, Guangxi) Infants and young children are susceptible to kidney stones when they consume milk powder with added melamine. The following descriptions belong to the chemical properties of melamine ( )
A. White powder B. Odorless C. Slightly soluble in water D. Weakly alkaline
Answer D
12. (2009? Enshi, Hubei) China is a country where natural disasters are frequent, and the following phenomena are often found in disasters, among which the chemical changes belong to ( )
A. Ice and snow melting B. C. Forest fires D. Tree branches breaking
Answer C
13. (2009? Hubei Enshi) China's "Food Safety Law" was formally implemented on June 1 this year, the state law enforcement agencies to carry out a comprehensive inspection of food and feed additives, in order to maintain food safety. Melamine is a nitrogen-containing organic compound, an important chemical intermediate product, with the chemical formula C3N6H6. It is a white crystal, slightly soluble in water, low-toxicity, stable at room temperature, and can be decomposed at high temperatures to release highly toxic cyanide. Long-term intake of animals will cause damage to the urinary system. Melamine has been added to dairy products and feed to increase the nitrogen content of the products. The correct description of melamine is ( )
A. The physical properties of melamine are: it is a white crystal, slightly soluble in water, low toxicity, high temperature decomposition.
B. Melamine is an organic substance
C. Melamine is a high-purity protein
D. The punctuation "nitrogen" in the material refers to the nitrogen molecule
Answer B
14. (2009? Huanggang, Hubei) The following changes must have occurred during the process of (2009?Hubei Huanggang) In the following changes, chemical changes must have taken place ( )
A.melting of snow and ice B.juicing of watermelon C.melting of paraffin D.spontaneous combustion of white phosphorus
Answer D
15. (2009?Hubei Xiangfan) The following changes belong to the chemical changes ( )
A.melting of paraffin B.dripping of water to become ice C.crushing of ore D.food spoilage
Answer D
16. (2009?Hubei Xiangfan) The following changes belong to chemical changes ( )
A. melting of paraffin B. dripping of water to become ice C. crushing of ore D.food spoilage
Answer D
16. p>16.(2009?Jiangsu Xuzhou) Use your knowledge of chemistry to judge the following statements, which are correct ( )
A.A. Sweetness occurs when you chew rice, and this process is a physical change
B.The synthesis of glucose by green plants converts solar energy into chemical energy
C.To increase the mass fraction of solute in clarified limewater, you can D. The white precipitate that appears when saturated ammonium sulfate solution is added to egg whites is a chemical change
Answer B
17. (2009? Yantai, Shandong) "Food is the God of the people". Chemical changes occur in the following processes ( )
A. panning rice B. washing vegetables C. juicing apples D. making wine from grapes
Answer D
18. (2009? Guangzhou, Guangdong) Chemical changes are utilized in the following processes ( )
A. remediation of the Guangzhou city's rivers and streams by dredging the silt
B. use of dilute hydrochloric acid to make the B.restore the brightness of rusty iron products with dilute hydrochloric acid
C.distill seawater to become drinkable distilled water
D.prepare 75% medical sterilizing alcohol concentrate with 95% alcohol
Answer B
19. (2009?Liupanshui, Guizhou) The following changes are chemical in nature ( ）
A.Electrical lamps emit light B.Sucrose dissolves C .wood made furniture D.food rotting
Answer D
20. (2009?Shandong Linyi) The following changes that occur in daily life are chemical changes ( )
A. water freezes B. paper burns C. glass breaks D. gasoline volatilizes
Answer B
21. (2009?Shandong Dongying) The following The following processes mainly involve only physical changes ( )
A. Concentrated sulfuric acid turns white paper black B. Wool and synthetic fibers are identified by cauterization method
C. quicklime turns into slaked lime when it encounters water D. Homemade acid-base indicator is made by soaking violet flowers in alcohol
Answer D
22. (2009?Qingdao, Shandong) Ammonia is a kind of important chemical raw material, which has a wide range of applications in industrial and agricultural production. It has a wide range of applications in agriculture and industry. An interest group of students in order to explore some of the properties of ammonia, the following experiments. From left to right in the figure below are the experimental steps and the corresponding phenomena.
Please summarize the properties of ammonia gas according to the information shown in the above figure:
(1) Physical Properties
①_______________________________________
② _______________________________________.
(2) Chemical Properties:
The ammonia obtained from the reaction of ammonia with water shows _________ properties.
Answers (1) 71 (2) 9:4 (3) 7.04%
23. (2009?Shandong Plain) In the experiment shown below, a chemical change took place ( )
A. Sublimation of dry ice B. Dissolution of CO2 in water C. Experimenting with the density of CO2 D. Filtering liquids through homemade filters
Answer B
24 ...(2009?Hainan Province) The following are chemical changes ( )
A.Ice melts B.Glass breaks C.Trees break D.Steel rusts
Answer D
Analyze this is a test question to distinguish between physical and chemical changes, to catch the process of change whether there is a new substance generated, the basic basis for judging changes "To see whether new substances are produced". Rusting of iron and steel is the result of a chemical change in matter.
Iron rusting in the air is actually a process in which iron interacts with oxygen, water and other substances to undergo a series of complex chemical reactions that convert iron into iron compounds. Iron and steel will also be rusted by other substances in the environment. The method of covering the surface of steel with a protective layer is often used to prevent steel from rusting.
25.(2009?Ya'an) The following properties of a substance are chemical in nature ( )
A. Color, state B. Melting point, boiling point C. Reducibility, flammability D. Density, hardness
Answer C
26.(2009?Beijing) The following changes are chemical in nature ( )
A. Sublimation of dry ice B. Burning of alcohol C. Bending of iron wire D. Juicing of watermelon
Answer B
27. (2009?Chaoyang) Chinese civilization is brilliant and has many inventions and creations in ancient times. The following descriptions do not involve chemical changes ( )
A. making stone tools B. firing ceramics C. grain brewing D. using gunpowder
Answer A
28. (2009?Suihua) The following changes do not belong to chemical changes ( )
A. food rotting B. plastics degrading C. glass shattering D. animals breathing
Answer C
29. (2009?Zhangzhou) We live in a colorful world, the following colors are presented by chemical changes ( )
A. Rainbow after the rain B. Colorful pictures C. Neon lights at night D. Holiday fireworks
Answer D
30. (2009?Maoming) The following changes belong to the chemical changes ( )
30.
A. dry ice sublimation B. electrolysis of water to make hydrogen and oxygen
C. volatilization of gasoline D. seawater passing through polymer separation membranes to make fresh water
Answer B
31.(2009?Zhanjiang)The following changes that take place in the kitchen are physical changes ( )
A. squeezing of fruit juices B. rotting of winter melon C. rusting of iron pot D. gas Burning
Answer A
32.(2009?Zhaoqing)The following changes are physical changes ( )
A.Electrolysis of water B.Rusting of iron and steel C.Burning of wood D.Shattering of glass
Answer D
33.(2009?Yulin)The following allusions, analyzed in terms of changes in substances, mainly reflect chemical changes ( )
A. Sima Guang smashed the cylinder B. Chiseling the wall to steal the light C. Burning the Red Cliff D. Iron mortar and pestle into a needle
Answer C
Master Teachers point gold Sima Guang smashed the cylinder, chiseling the wall to steal the light, the iron mortar and pestle into a needle, these changes did not appear to be a new substance, and therefore does not belong to the chemical change; and the fire burning the Red Cliff is a material combustion, the combustion of the substance will produce a new substance, and therefore belongs to the chemical change.
34. (2009? Hainan) the following are chemical changes ( )
A. ice melting B. glass broken C. trees broken D. steel rust
Answer D
35. (2009? Zhuzhou) the following phenomena belong to the chemical changes ( )
A. iodine dissolved in alcohol to make iodine B. porcelain bowl broken <
C. Gasoline volatilizes D. Candles burn
Answer D
36. (2009?Henan) The following changes are chemical in the former and physical in the latter ( )
A. Salt tanning with seawater Concentrated sulfuric acid turns white paper black B. Milk becomes acid Rice is brewed into vinegar
C. Ore crushes Food rots D. Candles burn Alcohol Volatilization
Answer D
37.(2009?Yichang)The following changes are chemical changes ( )
A.Food digestion B.Glass breaking C.Pestle and mortar making a needle D.Alcohol volatilization
Answer A
38.(2009?Enshi)Our country is prone to natural disasters, which are often characterized by the following phenomena (2009?Huanggang)The following changes must occur in the process of chemical change ( )
A.ice melting B.watermelon juice C.paraffin melting D.white phosphorus spontaneous combustion
Answer D
40.(2009?Huangshi)The following phenomenon is a chemical change ( )
A.Paper burning B.Glass breaking C.Ice melting D.Alcohol volatilizing
Answer A
41.(2009?Xiangfan)The following changes are chemical changes ( )
A.Paraffin wax melting B. (2009?Qiqihar)The following changes do not belong to the chemical change ( )
A. Food corruption B. Plastic degradation C. Glass breakage D. Animal respiration
Answer C
43. (2009?Loudi)The world of matter is full of colors. In our daily life, the following changes are physical changes ( )
A. porcelain bowl broken B. gas burning C. iron pot rusting D. food rotting?
Answer A
44.(2009?Xiangtan)The following changes in daily life are chemical changes ( )
A.clothes drying B.gasoline volatilization C.firecrackers D.glass breaking
Answer C
45.(2009?Changzhou)The history of the use of materials by human beings is the history of human progress. The main materials of the following items were not obtained by chemical changes at that time ( )
A. Horse Tap Fei Yan (bronze) B. Longquan Sword (iron) C. Witch Hazel D. Plastic utensils
Answer C
46. (2009?Lianyungang) The following changes belong to the chemical changes ( )
A. Colored paper is folded into paper cranes B. Snow melts slowly C. Grapes are made into wine D. Neon lights flash
Answer C
47.(2009?Taizhou)The following changes are chemical changes ( )
A. Gas explosion B. Salt tanning in seawater C. Ebb and flow of the tide D. Sublimation of dry ice
Answer A
48.(2009?Suqian)The following changes that occur in the kitchen. (2009?Suqian) the following changes in the kitchen are physical changes ( )
A. Bread mold B. Gas combustion C. Juice extraction D. Vinegar descaling
Answer C
49. (2009?Yangzhou) the city is the sixth national "Valley of light", the following process is a physical change ( )
A. Silicon dioxide (silicon dioxide), the city of Yangzhou is the sixth national "Valley of light". >A. Silicon dioxide (SiO2) and coke to make crude silicon (Si) B. Hydrogen and silicon tetrachloride (SiCl4) to make pure silicon (Si)
C. C. Cold water in solar water heaters into hot water D. In the role of catalysts in the solar photolysis of water to make hydrogen
Answer C
50. (2009? Jining) the development of chemical science provides mankind with more The following practices utilize chemical changes ( )
A. Seafarers distill seawater to obtain fresh water B. Craftsmen melt glass and blow various containers
C. Industry separates liquid air to obtain oxygen and nitrogen D. Greenhouse vegetable production applies carbon dioxide gas to increase yields
Answer D
51. (2009?Dongying) The following processes involve mainly physical changes only ( )
A. Concentrated sulfuric acid turns white paper black B. Wool and synthetic fibers are identified by cauterization
C. Quicklime turns into slaked lime in contact with water D. Homemade acid-base indicator is made by soaking violet flowers with alcohol
Answer D
52. (2009?Qingdao) The following changes belong to the chemical changes () )
A. Squeezing juice B. Shredding waste paper C. Setting off fireworks D. Cutting glass
Answer C
53. (2009?Weifang) The following changes are physical changes ( )
A. Rocket ignition B. Removing scale from warm water bottles with vinegar
C. Melting snow and ice with the snow-melting agent NaCl D. Kite fair Fireworks were set off at the opening ceremony
Answer C
36. (2009?Yibin)One of the following changes in daily life is different from the remaining three categories ( )
A.Water freezes into ice B.Wet clothes dry C.Kitchen knives rust D.Boiling water boils
Answer C
54.(2009?Chongqing)The following changes belong to chemical changes are ( )
A. firewood is split into pieces B. watermelon is squeezed into juice C. residual snow is turned into water D. sorghum is made into wine
Answer D
55.(2009?Jinjiang) The following substances are used mainly by utilizing their chemical properties ( )
A. combustible ice is used as fuel B. "dry ice " is used for artificial rainfall C. Pig iron is used to cast iron pots D. Copper is used to make wires
Answer A
56.(2009?Xiangtan)The uses of the following substances make use of their chemical properties ( )
A.Activated charcoal removes odors from the refrigerator B.Diamonds carve glass
C.Dry ice is used for Artificial rainfall D. Dilute sulfuric acid to remove rust
Answer D
57. (2009? Nanjing) "Flying Magnificence - I - China's first spacewalk space exhibition" was successfully concluded on May 24 in the Nanjing exhibition area. One of the fuels used in spaceflight is liquid hydrogen, the following statements belong to the chemical properties of H2 ( )
A. Liquid hydrogen combustion B. Hydrogen is the lightest gas
C. Hydrogen is flammable D. Combustion produces a light blue flame
Answer C
58. (2009? Taizhou) the following properties belong to the chemical properties of ( )
A. boiling point B. hardness C. reducibility D. solubility
Answer C
59.(2009?Foshan) The following are chemical changes ( )
A. Grinding cholagogue B. Producing a copper green on the surface of copper C. Filtering D. Preparing distilled water
Answer B
The master teacher's point of view that the production of a copper green on the surface of copper is due to the interaction of copper with airborne Oxygen, carbon dioxide, water *** with the result of the action, it is in the process of change to produce new substances, so it is a chemical change.
60. (2009?Harbin) The following substances are mainly used for their physical properties ( )
Answer D
61. (2009?Yibin) The following experimental operations are correct ( )
A. Put the leftover medicines used for the experiment back to the original reagent bottles B. Pad the asbestos mesh when heating the beaker
C. Add alcohol to the burning alcohol lamp. C. adding alcohol to a burning alcohol lamp D. heating a test tube full of liquid directly
Answer B
62.(2009?Guang'an)The nature of a substance determines the uses of the substance. In the following accounts of the uses of hydrogen, only the physical properties are reflected ( )
A. Preparation of metallic materials B. Filling and filling of sounding balloons C. Making high-energy fuel for rockets D. Preparation of hydrochloric acid
Answer B
63.(2009?Plain County) In the experiments shown in the figure below, a chemical change has taken place ( ）
A.Dry ice sublimation B.CO2 dissolving in water C. experimenting with the density of CO2 D. filtering a liquid through a homemade filter
Answer B
64.(2009?Qiqihar)The uses and properties of substances are closely related. The following uses mainly utilize their chemical properties ( )
A. Activated carbon is used in gas masks B. Diamonds are used as decorations C. Copper wires are used as wires D. Hydrogen is used as a high-energy fuel
Figure 1.1-3
Answer D
Famous Masters point out that the combustion of hydrogen in oxygen produces a large amount of energy, which pushes the fire The space shuttle lifts off, which utilizes the flammability of hydrogen. It is a chemical property of hydrogen.
65. (2009?Chifeng) The following processes are physical changes ( )
Answer B
66. (2009?Jining) Imitating the example, choose any two substances, and write one of their properties and their corresponding uses:
Substance Property Use
Hydrogen Flammability Clean, environmentally friendly, high-energy Fuel
Answer
Aluminum Conductivity Used as a conductor
Dilute hydrochloric acid Reacts with metal oxides Removes rust from metals
Description: As long as the property and use of the chosen substance correspond to each other, any other reasonable answer is also acceptable
67. (2009?Texas) Water is the source of life and a precious resource for human beings. It can sometimes be transformed into a white cloud, and sometimes into a fine rain. In the following processes, you think the water molecules have changed ( )
A. Water vapor condenses into water B. Sugar water is obtained after mixing sucrose and water
C. Water is electrified into hydrogen and oxygen D. Desalination of seawater by multi-stage flash distillation
Answer
68. (2009?Qiandongnan) The phenomena occurring in the following substances belongs to chemical changes 是（ ） 21st Century Education Network
A. Alcohol volatilization B. Battery charging C. Ore crushing D. Seawater sun screen 21st Century Education Network
Answer B
69.(2009?Yantai)1. A chemical change occurs in the following processes ( )
(A) panning rice (B) washing vegetables (C) juicing apples (D) making wine from grapes
Answer D
70.(2009?Taizhou) The following properties are chemical in nature ( )
A. Boiling point B. Hardness C. Reducibility D. Solubility
Answer
71.(2009?Taizhou) The following changes are chemical changes ( )
A.Gas explosion B.Salt tanning in seawater C.Ebb and flow of tide D.Sublimation of dry ice
Answer
72.(2009?Suqian) The following changes that take place in the kitchen are physical changes ( )
A.Bread getting moldy B.Burning of gas C.Extraction of Juice D.Removing scale with vinegar
Answer
73.(2009?Leshan)1.The following phenomena are physical changes ( )
A.Wet clothes drying out B.Rusting of steel C.Burning of paper D.Molding of food
Answer
74.(2009?Yantai) " Food is the most important thing for the people". A chemical change occurs in the following process ( )
Answer D
A. panning rice B. washing vegetables C. juicing apples D. making wine from grapes
75.(2009?Taizhou) The following properties are chemical in nature ( )
A.Boiling point B.Hardness C.Reducing property D.Solubility
Answer C
76 ..(2009?泰州)以下变化属于化学变化是（ ）
A.瓦斯爆炸 B.海水晒盐 C.潮高潮落 D.干冰升华
AnswerA
77..(2009?宿迁)以下变化发生的厨房，属于物理变化是（ ）
A.面包发霉 B.煤气燃烧 C.榨取果汁 D. using vinegar to remove limescale
Answer C
78. (2009?Leshan) The following phenomenon is a physical change ( )
A. wet clothes drying out B. steel rusting C. paper burning D. food molding
Answer
79. (2009?Huzhou) On September 11, 2008, the State Ministry of Health confirmed that melamine was contained in Sanlu brand infant milk powder, which led to the emergence of many patients with kidney stones in infants and young children across the country. The following properties of melamine are chemical properties ( )
A. Pure white crystals B. Density of 1.573 g/cm3
C. Soluble in hot water D. Decomposes into cyanide and nitrogen at high temperatures
Answer D
Master Teacher points out that the physical properties of a substance mainly include its color, state, odor, melting point, boiling point, Hardness, density, solubility and so on, so A, B, C are all belong to the substance of the substance's physical properties. The ability to decompose into cyanide and nitrogen at high temperatures is a property that manifests itself in the process of chemical change and is a chemical property of matter.
80. (2009?Xuzhou) The correct operation can ensure that the experiment is carried out smoothly. The following experimental operations are correct ( )
A. When preparing dilute sulfuric acid, water is slowly injected into the concentrated sulfuric acid along the wall of the measuring cylinder with constant stirring
B. To determine the pH of a solution, the pH test paper is moistened with water, and then inserted into the solution to be measured
C. In order to achieve the purpose of saving medicines, the remaining medicines after the experiment will be put back into the original bottle
D. There are Corrosive drugs cannot be weighed directly on the tray of the balance
Answer D
81. (2009?Hangzhou) Measuring a solution with a measuring cylinder, with the line of sight level with the lowest part of the concave surface of the liquid in the cylinder, reads 15 ml; after pouring out part of the liquid, looking down at the lowest part of the concave surface, reads 9 ml. The volume of solution actually poured out by the student ( )
A. less than 6 milliliters B. greater than 6 milliliters C. equal to 6 milliliters D. unable to determine the range
Answer