Examples.
1 The following substances are not organic synthetic materials ( ).
A Alloy B Plastic C Synthetic Fiber D Synthetic Rubber.
2 Chemistry is closely related to human health. The following statement is incorrect ( ).
a The more trace elements you consume, the better.
b Fresh vegetables and fruits are rich in vitamins.
c. Eating formaldehyde-soaked food is harmful to human health.
d Do not smoke for your own health and the health of others.
3 The human body contains a variety of elements. The following are essential trace elements for the human body ( ).
a iron, b, carbon, c, hydrogen, d, oxygen.
4 Grains, vegetables, fruits, poultry eggs and other foods are the main sources of daily nutrition. The following foods are rich in protein
a rice b greens c apples d eggs.
5 The Beijing 2022 Winter Olympics will be held jointly in Beijing and Zhangjiakou in Hebei Province from February 4, 2022 to February 20, 2022. Among the materials involved below that are composite materials are ( ).
a steel for building a bird's nest b a snowboard made of fiberglass.
c Mascot Bingdundun "Filling" - Artificial Wool D Plastic trail outside the venue.
6 Inactivated vaccines refer to the culture of viruses or bacteria and then the chemical method of inactivating their proteins. The following substances or measures do not "inactivate" proteins are ( ).
A Heating b Lead acetate solution C Normal saline d Formaldehyde.
7 Chemistry is closely related to life, and the following practices are unscientific ( ).
a Formaldehyde is widely used in the preservative of seafood.
b Use white vinegar to remove limescale from the thermos.
c Put waste newspapers in the garbage bin.
d Adolescents often drink milk to supplement calcium.
8 The main component of plastic wrap is polyethylene (chemical formula [CH2=CH2]. Polyethylene belongs to ( ).
a Metallic materials b Synthetic materials c Inorganic non-metallic materials d Composites.
9 The following classification of substances is correct ( ).
a Plastics, synthetic rubbers and alloys are all synthetic materials.
b Protein and starch are organic polymer compounds.
c Copper, mercury and zinc are essential trace elements.
d Quicklime, rust and dry ice are not metal oxides.
10 The sudden outbreak of "novel coronavirus pneumonia" threatens our health. The following are some of the people's perceptions in the face of the "new coronavirus pneumonia", which you think is in line with scientific reason ( ).
a When disinfecting at home, the thicker the disinfectant, the better.
b Rooms should be kept clean, hygienic and ventilated at all times.
c Smoking and drinking alcohol can prevent the "new coronavirus".
d Take medicine every day to replenish the chemicals needed by the person.
11 Among the following substances, the one that is considered synthetic is ( ).
a cotton b wool c polyester d natural rubber.
12 The following group of inductions of some chemical knowledge is completely correct (
13 Materials are important materials for the survival and development of human beings. The correct one in the following material categories is ( ).
a Aluminum alloy - metal material b Ceramic - synthetic material
c Stainless steel - composite d glass - organic material.
14 Lao Wang went to the doctor for leg and foot inconvenience, and the doctor recommended that he take calcium tablets and vitamin E
a Great neck disease b d. dwarfism c. osteoporosis d anemia.
15 The following is incorrect ( ).
a Formaldehyde is used to keep seafood fresh.
b When indoors**, do not open doors and windows rashly.
c Identification of wool and cotton fibers by burning method.
d If a gas leak is found, the power switch of the exhaust fan cannot be turned on immediately for exhaust gas.
16 The following materials are composite materials ( ).
a alloy b reinforced concrete c synthetic rubber d plexiglass.
17 Chemistry is closely related to life, and the following statement is incorrect ( ).
a. Calcium supplementation can prevent rickets in children b. Incineration of waste plastics can prevent white pollution.
c Do not use industrial salt, sodium nitrite, to cure ham, d Baking soda can be used as a fritter leavening agent.
18 The following statements are true.
a**Waste plastic reduces "white pollution".
b Ethanol is an organic polymer compound.
c Gases are easily compressible because of the small intermolecular space.
d Ammonium nitrate emits heat when dissolved in water.
19 Chemistry is closely related to our lives.
1) The standard value of nutritious lunch intake for students in a certain area (per person per day) is shown in the table.
Sugars and proteins in the table on the right are able to provide energy for the human body.
The following foods that are rich in starch are filled in the serial number).
a potato b milk c soybean oil.
Missing element name) may lead to osteoporosis, deformity, and rickets.
Essential nutrients for the human body are proteins, sugars, fats, minerals, water, and more
2) Materials are having an increasing impact on our lives.
The following belong to inorganic materials, and those that belong to composite materials are filled in the serial number).
a magnesium-aluminum alloy b polyethylene c reinforced concrete d plexiglass.
The following methods do not prevent steel corrosion is filled in the serial number).
A Oiled on the surface B Soaked in salt water C Chrome plating on the surface.
20 "Fireworks in March in West Yangzhou, Colorful Gathering World Horticultural Fair". On April 8, 2021, the World Horticultural Exposition was held in the beautiful Yizheng Zaolin Bay.
1) As shown in Figure 1: The mascot of the World Horticultural Exhibition "Kangkang Lele", its external material is pure wool, and the inner filling is polyester. The contents are filled with "inorganic" or "synthetic" or "composite") materials. Filled with "wool" or "polyester") is more absorbent and breathable.
2) As shown in Figure 2: The International Pavilion of the World Expo Park is like a "finless porpoise" swimming between the mountains and rivers of the World Horticultural Expo, and the venue uses a new type of plastic film material ETFE [chemical formula is (C2H2F2)N], which is beautiful and durable.
ETFE material fill in "yes" or "no") organic polymer.
The ratio of carbon and fluorine in the mass of ETFE material is the simplest integer ratio).
3) As shown in Figure 3, there are many thin and wrinkled Taihu Lake stones in the park, which are slowly formed by limestone after long-term erosion. The chemical equation for calcined limestone is limestone and hydrated lime, which are commonly used to improve acidic soils
4) As shown in Figure 4: A kind of tomato in the Green Organization Exhibition Park in the Expo Park has attracted the attention of many tourists.
The amount of nutrients per 100g of tomato is shown in the table below.
Carbohydrates in the table above are the common name for .
Calcium, phosphorus, and iron in the table above refer to "elemental", "elemental", or "atomic"). If it is not present in the human body, it may be susceptible to anemia.
Purple litmus solution is dropped into the vitamin C solution, and the litmus solution turns red, indicating that the vitamin C solution is "acidic" or "alkaline").
21 Chemistry is closely related to daily life and social development.
1) Clothing: The clothes people wear are woven from fibers. A classmate bought a woolen sweater, and he used chemical methods to identify the real and fake (operation, phenomenon):
2) Food: In order to maintain life and health, humans must consume food. The amount of nutrients per 100 grams of chocolate is shown in the table below.
Does all the 2142 kJ energy in the table come from sugars?Fill in "Yes" or "No"). Glucose (C6H12O6) is completely charred to obtain a black substance, indicating that glucose contains elements (fill in the element symbol).
Insufficient intake of elements makes it easy to get rickets. ** The trace elements that belong to the human body are filled in the element symbol).
Vitamin C supplementation is advisable. (Fill in the serial number).
a pork b greens c purified water.
3) Living: Hydrated lime can be used as a building material, after a period of time after the lime mortar stuccos the walls, the walls become white and hard, and the walls will also "sweat, the principle of which is to write chemical equations)
4) OK: Electric bicycles are lightweight, labor-saving, and energy-saving, and are increasingly loved by everyone. The electrolyte in the lead-acid battery is commonly used 30%-50% dilute sulfuric acid, and the relative molecular weight of the solute in the dilute sulfuric acid is 100g of 49% dilute sulfuric acid is prepared by adding purple litmus solution dropwise to it, and the mass of 98% concentrated sulfuric acid is g.
22 Formaldehyde (HCO) has a wide range of applications in chemicals, pharmaceuticals, pesticides, etc.
1) Formaldehyde exceeding the standard will endanger human health, and formaldehyde needs to be polluted. Use pothos, spider plant, ivy and other plants to absorb;The well-developed pore structure of activated carbon can capture formaldehyde molecules and reduce the concentration of formaldehyde in indoor airUsing the purple and black formaldehyde removal recommended by CCTV, its oxidative decomposition principle is more effective for formaldehyde, which can decompose formaldehyde into carbon dioxide and water. The essential difference between activated carbon and purple plus black formaldehyde removal is explained from a microscopic perspective).
2) The following statements about formaldehyde are correct
a Formaldehyde does not cause any harm to adults.
b To reduce the harm of formaldehyde, the most important thing is to control the source of pollution and reduce the chance of exposure to formaldehyde.
c Green plants such as pothos and spider plants are cultivated in the room, which not only beautifies the environment, but also absorbs formaldehyde.
3) "Photocatalyst technology" is widely used to eliminate formaldehyde, a pollutant in the room. Combined with the image analysis of Figure 1, the equation for the principle of catalytic decomposition of formaldehyde by nanoscale TiO2 photocatalyst is
4) Combined with the analysis of Fig-2, the optimal ratio of activated carbon powder to nanoscale TiO2 photocatalyst for formaldehyde removal under light conditions is as follows
5) When the ratio of activated carbon powder to nanoscale TiO2 photocatalyst is 2:1, the formaldehyde concentration increases significantly after 7 hours, which may be due to the fact that
6) The oxidant can treat formaldehyde pollution, combined with the analysis of Fig-3 and Fig-4: select the pH of the reaction when the formaldehyde removal effect of Naclo is good (the water temperature is about 15 -20), and the reagent that should be selected for the emergency treatment of formaldehyde pollution is the chemical formula).
23 Yangzhou is known as the capital of canals, culture and food, and has been a city of people since ancient times.
1) The old man left the Yellow Crane Tower in the west, and the fireworks went down to Yangzhou in March. 1. Don Leebai.
Meng Haoran's means of transportation to "go down to Yangzhou" was a wooden boat. Modern cruise ships commonly use FRP to make hulls, FRP belongs to fill "composite materials" or "metal materials").
Modern people can travel far and wide by airplane. Aluminum-lithium alloy materials are widely used in the manufacture of domestic C919 large aircraft, and the following are not aluminum-lithium alloy properties).
a. High density, b. High hardness, c. Corrosion resistance.
Cars are an important means of land transportation. Fuel vehicles must be equipped with exhaust catalytic purification device, which converts CO and NO in exhaust gas into CO2 and a non-polluting gas, and the chemical equation for the reaction is
2) The world is divided into three bright moonlit nights, and the two points of scoundrels are Yangzhou. 1. Tang Xu Ning.
Air quality affects people's viewing of the bright moon. Air belongs to the category of "mixture" or "purity").
The following practices are not conducive to improving air quality (cross-letters).
a Wind power b. Walking c. Open burning of garbage.
Gasification and liquefaction of coal can lead to clean energy and improved air quality. The chemical equation for the synthesis of methanol (CH4O) from CO and H2 in water gas under high temperature, high pressure and catalyst conditions is
3) The day before yesterday, I went to Yangzhou, and the wine was ripe and the crab was delicious. 1. Song Mei Yaochen.
The crab meat is delicious and rich in protein. When heated, an aqueous protein solution forms a precipitate, which is re-dissolved in water with "can" or "can't").
Ethanol (C2H6O) is found in various liquors. In the winemaking process, the sugars in the grain are first converted to glucose, which is then fermented to produce ethanol.
The following foods rich in vitamin C are filled letters).
a brine goose b tomato c prawns.